noun, na-adjective
Refers to something being necessary or required. Often used in formal or business contexts to indicate that something is needed.
この書類は入用ですか。
Is this document necessary?
旅行の準備で入用なものをリストにした。
I made a list of things needed for the trip.
noun
Used to refer to money needed for a specific purpose, such as living expenses or project costs. Often appears in compound words like 入用金 (necessary funds).
今月は入用が多くて大変だ。
This month is tough because there are many expenses.
事業を始めるにはまとまった入用がある。
Starting a business requires a substantial amount of money.
The exact derivation is uncertain. The kanji 入 (enter, insert) and 用 (use, business) combine to suggest something that is brought in for use, hence 'need' or 'necessary expenses'.