noun
great help; big help; lifesaver
Expresses that something or someone was a tremendous help, often in a situation where the speaker was in need. Commonly used in the phrase 大助かりだ.
君が手伝ってくれて大助かりだ。
It's a great help that you're assisting me.
この辞書は本当に大助かりです
This dictionary is a real lifesaver.