ぐーguu

1. nounrock (in rock-paper-scissors); stone; fist
   グーがチョキに、チョキがパーに、パーはグーに勝かつ。↗

   Rock breaks scissors. Scissors cut paper. Paper smothers rock.

   痛いたい！由紀子ゆきこ！痛いたいよ。グーで殴なぐるのはよせよ！↗

   Ow! Yukiko! That hurts! Quit hitting me with your fists!
2. adverb, interjectionungh; gulpsound made through a constricted throat or when in a distressing situation
3. adverb (with と)rumbling (of an empty stomach); growling; gurgling

• Synonym拳こぶしNeutralThe fist itself, the general everyday word. 「グー」 is the rock-paper-scissors gesture or a colloquial way of saying fist.
• SynonymげんこつCasualColloquial for a clenched fist; 「拳骨を落とす」 means to punch someone. 「グー」 is more the rock in rock-paper-scissors.
• Related拳こぶしNeutralThe fist itself, the general everyday word. 「グー」 is the rock-paper-scissors gesture or a colloquial way of saying fist.
• Related握り拳にぎりこぶしNeutralA tightly clenched fist; can also mean having no money at all. 「グー」 is the rock in rock-paper-scissors or a casual word for fist.
• Related拳固げんこCasualColloquial for a fist, as in 「げんこを食らう」 (take a punch). 「グー」 is more the rock in rock-paper-scissors.
• Related鉄拳てっけんWrittenA written/formal word for a tightly clenched fist, typically in 鉄拳制裁 (iron-fist punishment). 「グー」 stays with rock-paper-scissors or casual speech.

Use 「グー」 for rock in rock-paper-scissors or casually for a fist, as in 「グーで殴る」. For the fist in general pick 「拳」 or 「握り拳」; for a fist that lands a punch, 「拳骨」 or colloquial 「拳固」; 「鉄拳」 is written/formal, as in 鉄拳制裁.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. じゃんけんで、片手かたての指ゆびを全すべて握にぎった形かたち。