The adverb ‘undeniably‘ is used to emphasize that something cannot be denied or disputed. It is listed at C2 in the English Vocabulary Profile with the meaning: in a way that is almost certainly true. For example:
That‘s undeniably true.
In the English Grammar Profile, C1 point 64 in ADVERBS/modifiers is defined as:
a wide range of adverbs to indicate degrees of certainty.
Certainty is not easy to find in corpora. The adverbs have other uses. We can find in the EGP example sentences:
absolutely|undoubtedly|undeniably
Rank in iWeb:
1 ABSOLUTELY 1027853
2 UNDOUBTEDLY 129901
3 UNDENIABLY 24956
* * absolutely|undoubtedly|undeniably * *
However, the following example might be considered B1 by OXFORD with their definition:
‘Absolutely + verb’ = express strong feelings or extreme qualities to mean ‘extremely’
1 I ABSOLUTELY LOVE THIS 3596
Now I don’t know if this is the devil or the angel sitting on our conscience, sitting on television‘s shoulders,
but I do know that I absolutely love this image.
2 AND I ABSOLUTELY LOVE IT 2299
3 THERE IS ABSOLUTELY NO REASON 2011
4 I ABSOLUTELY LOVE THE 1931
5 I HAVE ABSOLUTELY NO IDEA 1752
6 . I ABSOLUTELY LOVE THE 1698
7 THERE IS ABSOLUTELY NO WAY 1606
8 . I ABSOLUTELY LOVE IT 1483
9 THERE IS ABSOLUTELY NOTHING WRONG 1124
10 . I ABSOLUTELY LOVE THIS 1061
11 YOU ARE ABSOLUTELY RIGHT . 899
12 THERE IS ABSOLUTELY NO NEED 810
13 I WOULD ABSOLUTELY LOVE TO 757
14 IF YOU ABSOLUTELY HAVE TO 750
15 IT IS ABSOLUTELY NECESSARY TO 745
16 YOU ‘RE ABSOLUTELY RIGHT . 731
17 I HAD ABSOLUTELY NO IDEA 726
18 I ABSOLUTELY LOVE THESE 719
19 IT IS ABSOLUTELY ESSENTIAL THAT 707
20 I AM ABSOLUTELY IN LOVE 699
21 ? ABSOLUTELY NOT . 688
22 THERE ‘S ABSOLUTELY NO REASON 672
23 AND I ABSOLUTELY LOVE THE 633
24 I ABSOLUTELY AGREE WITH 629
25 I ABSOLUTELY LOVE YOUR 629
26 IT MAKES ABSOLUTELY NO SENSE 628
27 THERE IS ABSOLUTELY NO EVIDENCE 619
28 THERE IS ABSOLUTELY NO DOUBT 598
29 I ABSOLUTELY LOVE MY 591
30 ” ABSOLUTELY , ” 584
31 IT IS ABSOLUTELY NECESSARY . 573
32 AND I ABSOLUTELY LOVED IT 561
33 YOU ARE ABSOLUTELY RIGHT , 514
34 ! I ABSOLUTELY LOVE THIS 495
35 I ABSOLUTELY LOVED THIS 492
36 AND I ABSOLUTELY LOVE THEM 490
37 YOU ARE ABSOLUTELY CORRECT . 478
38 IT HAS ABSOLUTELY NOTHING TO 470
39 IT IS ABSOLUTELY ESSENTIAL TO 468
40 YOU HAVE ABSOLUTELY NO IDEA 466
41 , I ABSOLUTELY LOVE THE 462
42 THERE ‘S ABSOLUTELY NO WAY 461
43 THERE ‘S ABSOLUTELY NOTHING WRONG 460
44 YOU ‘RE ABSOLUTELY RIGHT , 456
45 TO BE ABSOLUTELY SURE THAT 442
46 ! I ABSOLUTELY LOVE THE 432
47 UNLESS YOU ABSOLUTELY HAVE TO 432
48 I KNOW ABSOLUTELY NOTHING ABOUT 420
49 WE ARE ABSOLUTELY DELIGHTED TO 411
50 THERE IS ABSOLUTELY NOTHING TO 400
51 YOU HAVE ABSOLUTELY NOTHING TO 400
52 YOU ARE ABSOLUTELY RIGHT ABOUT 398
53 IT IS ABSOLUTELY CRITICAL THAT 394
54 . I ABSOLUTELY LOVED THE 388
55 I HAVE ABSOLUTELY NO DOUBT 383
56 , I ABSOLUTELY LOVE IT 372
57 NO , ABSOLUTELY NOT . 367
58 I HAVE ABSOLUTELY NO PROBLEM 365
59 ? ABSOLUTELY NOT ! 360
60 THIS IS ABSOLUTELY THE BEST 360
61 . UNDOUBTEDLY , THE 356
62 ! I ABSOLUTELY LOVE IT 345
63 , YOU ABSOLUTELY NEED TO 344
64 . I ABSOLUTELY LOVE MY 337
65 IT IS ABSOLUTELY VITAL THAT 337
66 IT IS ABSOLUTELY NECESSARY THAT 331
67 IT IS ABSOLUTELY IMPERATIVE THAT 327
68 . I ABSOLUTELY LOVED IT 318
69 WE ARE ABSOLUTELY THRILLED TO 318
70 THAT I ABSOLUTELY LOVE . 316
71 IT ‘S ABSOLUTELY NECESSARY . 315
72 I WOULD ABSOLUTELY RECOMMEND THIS 312
73 THERE IS ABSOLUTELY NO EXCUSE 308
74 IF YOU ABSOLUTELY NEED TO 307
75 . I ABSOLUTELY LOVE THEM 305
76 , I ABSOLUTELY LOVE THIS 302
77 THERE IS ABSOLUTELY NOTHING THAT 302
78 IT IS ABSOLUTELY TRUE THAT 300
79 YOU ARE ABSOLUTELY RIGHT THAT 297
80 WE ARE ABSOLUTELY COMMITTED TO 295
81 THERE WAS ABSOLUTELY NO WAY 293
82 , YOU ABSOLUTELY HAVE TO 290
83 I ABSOLUTELY LOVE IT 289
84 ? ABSOLUTELY . WE 288
85 IT IS ABSOLUTELY POSSIBLE TO 288
86 TO MAKE ABSOLUTELY SURE THAT 286
87 I WAS ABSOLUTELY BLOWN AWAY 285
88 THAT HAS ABSOLUTELY NOTHING TO 280
89 ONLY WHEN ABSOLUTELY NECESSARY . 273
90 I ABSOLUTELY LOVED THE 272
91 IF YOU ABSOLUTELY CAN NOT 272
92 IT IS ABSOLUTELY NECESSARY FOR 270
93 ? ABSOLUTELY . I 269
94 ! I ABSOLUTELY LOVE YOUR 267
95 THERE IS ABSOLUTELY NO POINT 258
96 . I ABSOLUTELY LOVE THAT 257
97 I AM ABSOLUTELY DELIGHTED TO 249
98 I AM ABSOLUTELY THRILLED TO 247
99 THAT MAKES ABSOLUTELY NO SENSE 246
100 IT WAS ABSOLUTELY AMAZING . 245
*removed ‘absolutely’ from the search:
1 . UNDOUBTEDLY , THE 356
2 THIS IS UNDOUBTEDLY ONE OF 240
3 IT IS UNDOUBTEDLY TRUE THAT 196
4 IT IS UNDOUBTEDLY ONE OF 162
5 THERE WILL UNDOUBTEDLY BE A 136
6 AND IS UNDOUBTEDLY ONE OF 109
7 IS , UNDOUBTEDLY , THE 108
8 THERE WILL UNDOUBTEDLY BE SOME 100
9 . UNDOUBTEDLY , THERE 99
10 . UNDOUBTEDLY ONE OF 97
11 THIS IS UNDOUBTEDLY THE MOST 95
12 . UNDOUBTEDLY THE MOST 91
13 THIS IS UNDOUBTEDLY THE BEST 91
14 WHAT IS UNDOUBTEDLY ONE OF 85
15 WHAT WILL UNDOUBTEDLY BE A 85
16 , IS UNDOUBTEDLY ONE OF 83
17 IT IS UNDOUBTEDLY THE MOST 78
18 IS , UNDOUBTEDLY , A 74
19 THERE WILL UNDOUBTEDLY BE MORE 73
20 HE IS UNDOUBTEDLY ONE OF 72
21 . UNDOUBTEDLY , THIS 69
22 IT ‘S UNDOUBTEDLY ONE OF 68
23 IT WILL UNDOUBTEDLY BE A 68
24 IT IS UNDOUBTEDLY THE BEST 62
25 IT IS UNDENIABLY TRUE THAT 61
26 IT IS UNDOUBTEDLY THE CASE 61
27 THIS IS UNDOUBTEDLY DUE TO 58
28 AND WILL UNDOUBTEDLY CONTINUE TO 55
29 THIS WILL UNDOUBTEDLY BE A 54
30 THIS IS UNDOUBTEDLY TRUE , 52
31 IT WAS UNDOUBTEDLY ONE OF 51
32 . UNDENIABLY , THE 48
33 , AND UNDOUBTEDLY ONE OF 47
34 WHICH IS UNDOUBTEDLY ONE OF 47
35 AS YOU UNDOUBTEDLY KNOW , 46
36 THERE WILL UNDOUBTEDLY BE MANY 45
37 YOU WILL UNDOUBTEDLY WANT TO 45
38 HE WAS UNDOUBTEDLY ONE OF 44
39 . UNDOUBTEDLY , A 43
40 WHAT IS UNDOUBTEDLY THE MOST 43
41 WILL , UNDOUBTEDLY , BE 43
42 IT WOULD UNDOUBTEDLY BE A 42
43 . UNDOUBTEDLY THE BEST 40
44 . UNDOUBTEDLY , YOU 38
45 IS , UNDOUBTEDLY , ONE 37
46 THIS WILL UNDOUBTEDLY BE THE 37
47 YOU WILL UNDOUBTEDLY COME ACROSS 37
48 . ITS UNDOUBTEDLY NEWBIE-FRIENDLY AND 36
49 AND WILL UNDOUBTEDLY BE A 36
50 $50/PER H UNDOUBTEDLY AND THE 35
51 . UNDOUBTEDLY , IT 35
52 . UNDOUBTEDLY , SOME 35
53 . UNDOUBTEDLY THERE ARE 35
54 YOU HAVE UNDOUBTEDLY HEARD OF 35
55 , IS UNDOUBTEDLY THE MOST 34
56 WHAT WILL UNDOUBTEDLY BE THE 34
57 YOU ‘VE UNDOUBTEDLY HEARD OF 34
58 YOU ARE UNDOUBTEDLY FAMILIAR WITH 34
59 THIS IS UNDOUBTEDLY TRUE . 33
60 YOU WILL UNDOUBTEDLY NEED TO 33
61 . UNDOUBTEDLY , ONE 32
62 . UNDENIABLY BELIEVE THAT 31
63 . UNDOUBTEDLY , THESE 30
64 WAS , UNDOUBTEDLY , THE 30
65 WHAT IS UNDOUBTEDLY THE BEST 30
66 YOU ‘LL UNDOUBTEDLY WANT TO 30
67 ” IS UNDOUBTEDLY ONE OF 29
68 . UNDOUBTEDLY , MANY 28
69 ? UNDOUBTEDLY , THE 28
70 WHICH WILL UNDOUBTEDLY LEAD TO 28
71 ” UNDOUBTEDLY , THE 27
72 ” UNDOUBTEDLY , THE 27
73 AND , UNDOUBTEDLY , THE 27
74 SHE IS UNDOUBTEDLY ONE OF 27
75 THERE ARE UNDOUBTEDLY MANY MORE 26
76 THIS WAS UNDOUBTEDLY ONE OF 26
77 WHAT WILL UNDOUBTEDLY BE AN 26
78 YOU WILL UNDOUBTEDLY HAVE TO 26
79 IT IS UNDENIABLY ONE OF 25
80 IT IS UNDOUBTEDLY NEWBIE-FRIENDLY AND 25
81 THIS WILL UNDOUBTEDLY LEAD TO 25
82 AND IS UNDOUBTEDLY THE MOST 24
83 HE ‘S UNDOUBTEDLY ONE OF 24
84 IS , UNDENIABLY , A 24
85 IT ‘S UNDOUBTEDLY GOING TO 24
86 YOU ‘VE UNDOUBTEDLY HEARD ABOUT 24
87 YOU ‘VE UNDOUBTEDLY HEARD THE 24
88 AND WILL UNDOUBTEDLY LEAD TO 23
89 IT WILL UNDOUBTEDLY CONTINUE TO 23
90 IT WOULD UNDOUBTEDLY BE THE 23
91 THAT IS UNDOUBTEDLY ONE OF 23
92 THIS IS UNDENIABLY ONE OF 23
93 WHICH IS UNDOUBTEDLY THE MOST 23
94 IT ‘S UNDOUBTEDLY TRUE THAT 22
95 IT WILL UNDOUBTEDLY BE THE 22
96 THERE WILL UNDOUBTEDLY BE AN 22
97 THERE WILL UNDOUBTEDLY BE TIMES 22
98 ) IS UNDOUBTEDLY ONE OF 21
99 , YOUVE UNDOUBTEDLY HEARD OF 21
100 . ” UNDOUBTEDLY , THE 21