na-adjective, noun
ideal; perfectly suitable; well-suited
Describes something that is exactly right for a purpose, condition, or person. Often used in formal or written contexts.
この土地はブドウ栽培に好適だ。
This land is ideal for growing grapes.
彼はその仕事に好適な人材だ。
He is a perfectly suitable person for the job.
Compound of 好 (favorable, good) and 適 (suitable, fit). The exact historical derivation is uncertain, but the kanji combination directly conveys the meaning of being well-suited.