少しも〜ない details
not in the least — degree negation, "not even a little," open to verbs and both adjective classes + write + not
sukoshi mo kakanai
not in the least — degree negation, "not even a little," open to verbs and both adjective classes
meaning: not write in the least
結果がどうであれ、少しも後悔しない。
kekka ga dou de are, sukoshi mo koukai shinai.
Whatever the result, I won't regret it in the least. neutral
値段が高くても、少しも惜しくない。
nedan ga takakute mo, sukoshi mo oshikunai.
Even if it's expensive, I don't mind spending it one bit. neutral
Examples
not in the least — flatly denies any degree of a verb or adjective, "not even a little"
結果がどうであれ、少しも後悔しない。
kekka ga dou de are, sukoshi mo koukai shinai.
Whatever the result, I won't regret it in the least. neutral
値段が高くても、少しも惜しくない。
nedan ga takakute mo, sukoshi mo oshikunai.
Even if it's expensive, I don't mind spending it one bit. neutral
平気、平気。少しも痛くないから。
heiki, heiki. sukoshi mo itakunai kara.
I'm fine, I'm fine — it doesn't hurt one bit. casual
Formation
すこしも{V-nai}attaches to ない-form
Notes
少しも静かじゃない); only the verb row here is fillable. ちっとも is its
casual counterpart; 全然 covers the same ground but also takes positive
complements (全然大丈夫), which 少しも never does.
Related patterns
Similar
Both are pre-verbal adverbs reaching for a distant ない, but 少しも denies DEGREE ("not even a little") and freely modifies verbs, i-adjectives and na-adjectives alike, while ろくに denies the QUALITY of how an act was carried out, and modifies verbs only, implying it was done badly or barely at all.