noun
reliability; trustworthiness; dependability
Refers to the quality of being someone you can count on. Often used when describing a person's character or the feeling that someone is dependable.
彼は頼りがいのあるリーダーだ。
He is a reliable leader.
あの人は頼りがいがないから、大事な仕事は任せられない。
That person isn't dependable, so I can't entrust important work to them.
頼りになる is an adjective phrase meaning 'reliable' or 'can be relied on,' while 頼りがい is a noun emphasizing the worth or value of relying on someone.
信頼 is a more formal noun meaning 'trust' or 'confidence,' often used in business or serious contexts. 頼りがい is more personal and implies a sense of emotional reliance.
Compound of 頼り (tayori, 'reliance') + がい (-gai, 'value/worth of doing something'). The がい suffix comes from 甲斐 (kai, 'effect/result'), indicating the worth or reward of an action.