妄言轻动

不稳重

佻相
不沉稳：佻易
行动不沉着，不稳重：轻（轻佻）
言行不稳重：妄言轻动
浮躁，不稳重：浮动

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言行

行言　言动
言行不互相矛盾：言行相顾
言行为人表率：言坊行表
言行高洁：言芳行洁
行为和言语都很严肃：行峻言厉
言行迟缓：滞碾
言行无标准：澜倒波随
言行不谨慎、不稳重：妄言轻动
言行卑劣：人头畜鸣
品质、言行低级、恶劣：卑鄙(～无耻)
(言语和行为：言行)

另见：言语　行为　分寸　条理

妄言轻动wàng yán qīng dòng

not choose one’s words with care; not spare in the use of words
❍ 宝钗原不～，便此时亦是坦然自若： …… (《红楼梦》259)❶…and Baochai also behaved in the manner natural to her,choosing her words with care.
❷…and Baochai,whose punctilious correctness made her always sparing in the use of words even though on this occasion she was probably the least uncomfortable of those present,said little to advance the conversation.

妄言轻动wànɡ yán qīnɡ dònɡ

胡乱地说，轻率地做。指言行不稳重。