Je was op zoek naar: clenched (Engels - Japans)

clenched teeth
歯の食いしばり

my stomach is clenched with hunger.
空腹でおなかがぺしゃんこだ。

with an open hand or a clenched fist?
平手または握り拳で?

knock your teeth out with the fist i got clenched
おまえの歯にパンチだぜ

you clenched when you said that. it was practically audible.
口調が固いね はっきりわかった

resulting from a clenched fist striking something or... someone.
固めた拳が何かや 誰かに当たってできた・・・

all right? i'll break your eyeball with a fist i got clenched
目に一発くらわしてやる！

if you're gonna hit someone with a clenched fist be sure to not tuck your thumb in.
握り拳で誰かを殴るなら 必ず親指を中に押し込むな

no, is talking with your teeth clenched together so you don't get lines in your face.
顔にシワを作らないように 歯を食いしばる

but, when i come back downstairs after standing in a cupboard with my fists clenched, you're gonna be in so much trouble.
でも僕が下に戻って 衣装棚で拳を握ったら 本当に困った事に なるんじゃない