godan verb (-ku), intransitive verb
be sticky; be stringy; be glutinous
Describes a sticky, viscous, or gooey texture, often of food or substances. Intransitive verb.
納豆はよく粘つく。
Natto is very sticky.
この餅は冷めると粘つかなくなる。
This rice cake loses its stickiness when it cools.
Standard kanji-kana mixed spelling.
粘る is more common and can also mean 'to persevere'; 粘つく focuses on the physical sticky texture.
Compound of 粘 (neba, 'sticky') + つく (tsuku, 'to stick'). The exact derivation of つく is uncertain, but it is a common suffix for adhesive or persistent states.