informal
/ɪnˈfɔːməl/adjective
1- having a relaxed, friendly, or unofficial style, manner, or nature不拘礼节的, 轻松的; 友好的; 随意的：
an informal atmosphere
无拘束的气氛
an informal agreement between the two companies.
两公司间的非正式协定。
1.1
- of or denoting a style of writing or conversational speech characterized by simpler grammatical structures, more familiar vocabulary, and greater use of idioms and metaphors（写作或谈话风格）非正式的, 随意的, 轻松的。
1.2
- (of dress) casual; suitable for everyday wear（着装）闲适的, 适合日常穿着的。
1.3
- (of economic activity) carried on by self-employed or independent people on a small scale, especially unofficially or illegally（经济活动）自发组织的（尤指非官方或非法的）。
派生词