informal
词形变化：
同义词：
casual | easy | everyday | colloquial | accessible | kitchen | relaxed | familiar | unceremonious | unofficial | off-the-record | unauthorized | unsanctioned | confidential | idiomatic | vernacular | loose | cozy | irregular | intimate |
反义词：
formal |
词义辨析：
同义参见:
casual
kitchen
everyday
easy
colloquial
accessible
反义:
a.非正式的; 通俗的
formal