鼻水がたれているよ。

鼻水がたれているよ。

Your nose is running.

鼻水(はなみず)がたれているよ。

Hanamizu ga tareteiru yo.

鼻水 (はなみず)

nasal mucus; dripping nose

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

垂れる (たれる)

to hang; to droop; to dangle; to sag; to lower; to pull down; to leave behind (at death); to give; to confer; to drip; to ooze; to trickle; to drop

よ (よ)

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!

Readings: ビ、はな

Meanings: nose, snout

Readings: スイ、みず、みず-

Meaning: water