ooze, flow, soak in, penetrate, secrete
泌 centers on a liquid moving slowly and spreading: oozing, flowing, soaking in, or penetrating. The secretion sense is a natural extension of a fluid being released and absorbed.
泌 combines 氵 (water) with 必, which likely contributes the sound and the idea of something being forced or pressed out, as in secretion or oozing.
Water 氵 beside 必, which looks like a heart with a slash, suggests a liquid being pressed out drop by drop. Imagine water oozing from a squeezed heart.
For ヒツ, picture a drop of water hitting a hot surface with a hiss: hits -> ヒツ, as the liquid oozes and evaporates.
—
secretion
urinary organs
endocrine
endocrinology
endocrine disruptor; endocrine disrupting-chemicals
endocrine gland
secretory diarrhea
secretion
secretion
secretory gland
salivation; secretion of saliva
external secretion
exocrine gland
Japanese Society for Pediatric Endocrinology
Japan Society for Comparative Endocrinology; JSCE
lactation
milk yield
urination
American Urology Association
urology