KanjiJLPT N1
Sticky

sticky, glutinous, greasy, persevere

Mnemonic

Overcooked rice begins to occupy every surface it touches—bowls, chopsticks, countertops, your fingers. The gluey mess is impossibly sticky, and the harder you pull away, the more the rice occupies new territory across your hands.
Additional thoughts
Picture pulling your hand from a pot of overcooked rice and long gooey strands stretching between your fingers and the pot. The rice has occupied your skin like glue. The stickier it is, the more it spreads.
Quick recall
Overcooked rice that occupy-es every surface is hopelessly sticky.

Details

The keyword for 粘 is sticky. This kanji refers to the quality of being adhesive, viscous, or glutinous—the tendency of a substance to cling or stick to surfaces. It conveys the idea of thickness and cohesion found in materials like clay, paste, or mucus. By extension, it can also describe a person's tenacity or persistence, as in someone who "sticks with" something and refuses to give up.
On'yomi
ねん
Kun'yomi
ねば.る