口くちにする

く

ち

に

す

る

口にする · suru verb (irregular)

Meanings

Literally 'put in the mouth'; used for consuming food or drink, often with a nuance of trying or taking a small amount.

Used for bringing something up in conversation, often with a nuance of reluctance or significance.

食たべるN5sense 1
食べる is the plain, everyday verb for eating anything, while 口にする is more literary and stresses the act of putting food or drink into one's mouth, often in small amounts.
言いうN4sense 2
言う is the neutral, general verb for saying something, while 口にする adds a nuance of deliberately or reluctantly putting a specific thing into words.
味あじわうN3sense 1
味わう emphasizes savoring or appreciating the taste, whereas 口にする simply means to consume something, sometimes just a small taste.
述のべるN3sense 2
述べる is a formal verb for stating or explaining something in detail, while 口にする just means to mention or bring up a topic, often briefly.

黙だまるN3sense 2
黙る means to stay silent or keep something unsaid, the opposite of 口にする's sense of speaking or mentioning something.

Compound of 口 (mouth) + にする (to make into). Literally 'to make into one's mouth', i.e., to put in one's mouth, extended to speaking.