What is the meaning of ?

role, service, use

yaku, scoring combination; a condition that scores points when met, usually in the form of a specific combination of cards or tiles.

playing the role of...

war; battle

This term needs a translation to English. Please help out and add a translation, then remove the text {{rfdef}}.

(historical) labour service

(historical) war service, armament, enlisting

Source: wiktionary.org