I'll think about it again when I'm sober.
Maybe he can hold his liquor; he always has a sober face.
素面 describes a sober state with no trace of alcohol, the direct opposite of 酔い's drunken state.
素面 is the standard modern word for being sober, whereas 素顔 only rarely carries that meaning and normally means a bare or true face.
Katakana spelling is common in modern usage, especially in casual contexts.
Kanji form with gikun reading; rarely used.
Hiragana spelling; the word is usually written in kana.
Rarely used kanji form.
An old word for being sober or in one’s ordinary state, conventionally written 素面 or 白面. Its deeper formation is uncertain, and the spellings do not securely establish the word’s origin.