あいた口も塞がらぬ

あいたくちもふさがらぬ

surprising, shocking, jaw-dropping

開いた口が塞がらない

あいたくちがふさがらない

to be surprising, to be shocking, to be jaw-dropping

塞がる

ふさがる ふたがる

to be closed, to be blocked, to be healed (e.g. wound), to be shut up

塞がり

ふさがり ふたがり

being closed, being blocked up, being occupied, hindrance, impedance

手が塞がる

てがふさがる

to be busy, to be tied up doing something

口塞ぎ

くちふさぎ

prohibition of speaking, imposition of silence, tiny morsel

立塞がる

たちふさがる りつふさがる

to stand in one's way

塞翁が馬

さい おう がうま

the future is unpredictable; inscrutable are the ways of heaven; the irony of fate

方塞がり

かたふたがり かたふさがり

unlucky direction (in Onmyoudou; due to the presence of a god such as Ten'ichijin)

口が多い

くちがおおい

talkative, loquacious, garrulous, voluble

口が軽い

くちがかるい

having a loose tongue, being talkative, speaking without thinking, being unable to keep a secret

口が臭い

くちがくさい

having bad breath; having halitosis

口が堅い

くちがかたい

tight-lipped, able to keep a secret

口が悪い

くちがわるい

sarcastic, having a sharp tongue, having a sharp nasty tongue

口が重い

くちがおもい

incommunicative, taciturn

口が減らない

くちがへらない

fast-talking, always having another argument ready, not able to keep one's mouth shut, never at a loss for words

がま口

(coin) purse with a metal clasp

口が曲がる

くちがまがる

to incur the wrath of god (e.g. by speaking ill of somebody behind their back), to get into trouble

知らぬが仏

しらぬがほとけ

Ignorance is bliss