retard
意味
- …の進歩(進行)を遅らせる(のろくする)
語源
英語の原文（Wiktionary）
From Middle English retarden, from Anglo-Norman retarder, from Latin retardō (“to retard”, from re- + tardus (“slow”)).
From Middle English retarden, from Anglo-Norman retarder, from Latin retardō (“to retard”, from re- + tardus (“slow”)).