prostrated, bend down, bow, cover, lay (pipes)
伏 centers on lowering oneself or something else: prostrating, bending down, bowing, covering, or laying pipes flat. The common thread is moving into a low, hidden, or face-down position.
伏 combines 亻 (person) and 犬 (dog), suggesting a person crouching or lying low like a dog. This is a standard semantic-component explanation.
A person 亻 beside a dog 犬: imagine someone bowing or lying face-down next to a dog, both low to the ground.
For フク, picture a person bowing so low they look like a fuku (服, clothing) lying flat on the ground: fuku -> フク.
surrender; capitulation; submission
lying down
concealment; hiding; ambush
foreshadowing
ambush; lying in wait for an ambush
undulation
to lay (something) face down; to place upside down; to turn over (face down)
push-up (exercise); press-up
yamabushi; practitioner of Shugendō
to prostrate oneself (before)
lying face down; lying on one's face
ambush; troops in ambush
to lie face down; to lie flat (on one's stomach); to fall prostrate
symbol used in place of a censored word (e.g. blank, circle, X, asterisk)
subterranean stream
to twist someone's arm and throw them to the ground; to hold (someone) down by twisting their arm; to wrestle (someone) to the floor
preaching down; breaking down someone's false beliefs through confrontation (in order to convert them to the right faith)
abode of demons; hotbed (of graft); pandemonium
lying low (and awaiting one's chance); biding one's time; submitting at first (to then strike later)
impaction