adjective/ʁɛs.tʁɛ̃/
restricted.; narrow.; sombre, without ostentation.
“Son pardessus, son plastron, son chapeau cronstadt même, présentaient je ne sais quoi de décent, de restreint et de distingué…” — His overcoat, his plastron, even his cronstadt hat, presented something decent, restrained, & distinguished...
Borrowed or adapted from Latin restrictus, modeled after étreint.