adverb
Used to emphasize a degree or feeling, often with adjectives or verbs expressing inability to describe something adequately. Common in phrases like 何とも言えない (indescribable).
その景色は何とも美しかった。
The scenery was really beautiful.
彼の言い分
His argument is extremely hard to understand.
adverb
(not) at all; (not) anything; (not) a bit
Used with a negative verb to mean 'not at all' or 'nothing in particular'. Often appears as 何ともない (nothing is wrong) or 何とも思わない (don't think anything of it).
彼の言葉は何とも思わなかった。
I didn't think anything of his words.
この料理は何とも言えない味だ。
This dish has an indescribable taste.