noun
lipped bowl; spouted bowl
A bowl or dish with a pouring lip, used for liquids or serving. Common in traditional Japanese tableware.
この片口は酒を注ぐのに便利だ。
This lipped bowl is convenient for pouring sake.
noun
one side of a story; one party's account
Refers to hearing only one side of a dispute or argument, often implying incompleteness or bias. Frequently used in the phrase 片口を聞く.
彼の話だけ聞いても片口だ。
Just listening to his story gives only one side.
片口を聞いて判断してはいけない。
You shouldn't judge after hearing only one side.
Compound of 片 (kata, 'one side') and 口 (kuchi, 'mouth' or 'opening'). The lipped-bowl sense refers to the single spout; the argument sense metaphorically extends 'one-sided mouth' to hearing only one party's account.