What it means
どうにも〜ない expresses the inability to do something by any means, despite trying or considering the matter from different angles. It often conveys strong frustration, helplessness, or the speaker's firm conclusion that a solution is impossible. The construction commonly occurs with potential, cognitive, or evaluative verbs, and it is stronger than a neutral negative statement.
Usage note
どうにも〜ない should not be confused with a simple negative statement. It normally implies that the speaker cannot achieve or accept something no matter what they do, rather than merely stating that an action does not occur.
How to use it
どうにもVerb (ます-stem)ません
この説明はどうにも納得できません。
I cannot accept this explanation by any means.
どうにもVerb negative stemない
この説明はどうにも納得できない。
I cannot accept this explanation by any means.