KanjiJLPT N1
Ooze

ooze, flow, soak in, penetrate, secrete

Mnemonic

After a storm, the old stone cellar walls invariably begin to ooze. No sealant can stop it—every storm drives water deeper into the rock, and it invariably finds its way through, seeping out in slow, silent rivulets that pool across the floor.
Additional thoughts
Picture a damp basement after heavy rain: water quietly weeping from stone walls. Storm always causes it; it invariably happens. That inevitability IS the ooze.
Quick recall
A storm invariably makes the old walls ooze.

Details

The keyword for 泌 is ooze. This kanji refers to the slow seeping or secretion of liquid, much like how fluids gradually permeate or flow out from a surface. It is most commonly encountered in medical and biological contexts, particularly in relation to the secretion of bodily fluids, as in the urinary or endocrine systems. The character conveys the idea of something liquid emerging quietly and steadily, rather than in a sudden rush.
On'yomi
ひつ、ひ

Used in vocab