noun
A firm promise or guarantee that something will happen or is true. Often used in the phrase 請け合いだ (it's a sure thing).
See also: 請け合う
彼の成功は請け合いだ。
His success is guaranteed.
この製品の品質は請け合いです。
The quality of this product is assured.
Variant using 受け; less common but still seen.
Abbreviated variant; rarely used.
Noun form of the verb 請け合う (to undertake, to guarantee), from 請ける (to receive, to undertake) + 合う (mutually).