lick, lap up, burn up, taste, undergo, underrate, despise
舐 centers on using the tongue to touch or consume: licking, lapping up, or tasting. The extended senses of undergoing something unpleasant, underrating, or despising likely come from the image of being forced to lick the dust or being treated as lowly.
舐 combines 舌 (tongue) with 氏, which likely contributes the sound. The character directly represents the action of the tongue.
A tongue (舌) reaching out to taste something held by a clan (氏) member: you lick it to see if it's good.
For シ, imagine a tongue licking a sheet of paper: sheet -> シ, and the tongue tastes the paper.
to lick; to lap; to suck
a lick; one lick
anilingus; analingus; rimming; rimjob
to lick something up; to lap something up
supporting each other after suffering similar hardships; licking each other's wounds
currying favour (favor); brown-nosing; bootlicking; sucking pus from carbuncles and licking hemorrhoids (haemorrhoids)
oculolinctus; worming; eyeball-licking fetishism
to lick one's lips
going insultingly easy on an opponent; not trying one's best
going insultingly easy on an opponent; not trying one's best
to lick off; to take (something) off by licking
to lick all over; to run one's tongue over
to lick (all) up; to lick all over; to lick clean
to look down on; to treat with contempt; to mock; to make light of
licking
licking one's chopsticks (a breach of etiquette)
to lick
snow remaining in the form of a mist after it has melted