overnight stay, put up at, ride at anchor
泊 centers on temporarily stopping in one place, especially for the night: staying overnight, lodging, or a ship riding at anchor.
泊 combines 氵 (water) with 白, which likely contributes the sound. The idea of a boat stopping on water led to the meanings of overnight stay and anchoring.
Water 氵 and white 白 together suggest a white boat resting on calm water, tied up for the night.
For ハク, imagine a boat anchoring in a quiet backwater cove: back -> ハク, and the boat stays overnight.
accommodation; lodging
counter for nights of a stay
to stay at (e.g. hotel)
(overnight) stay; lodging
to give shelter to; to lodge; to put up; to accommodate
anchorage; anchoring; mooring
private residence temporarily taking lodgers
anchorage; berth
staying the night; lodging (at)
staying somewhere else (overnight); spending the night away (e.g. from home); going home (e.g. from hospital) for the night; sleepover
staying overnight without meals (at a hotel, etc.); bed without board
place of assemblage for the bold and ambitious
staying somewhere (overnight) due to circumstances
staying over
(overnight) stay; lodging
sleepover; slumber party
nursery school sleepover
(staying) one night; overnight stay
overnight march
no-show (at hotel)