suck, imbibe, inhale, sip
吸 centers on drawing something inward, typically with the mouth: sucking, inhaling, sipping, or absorbing liquid.
吸 combines 口 (mouth) with 及, which likely contributes the sound and the idea of reaching or drawing in, together suggesting sucking or inhaling.
The mouth 口 is open, and the right side 及 looks like a person reaching out to pull something in. Together they show a mouth drawing something inward: sucking or inhaling.
For キュウ, imagine a cute little animal sucking up its food with a quick 'kyu!' sound: kyu -> キュウ, and the mouth 口 is busy inhaling.
to breathe in; to inhale; to smoke (a cigarette, etc.)
absorption; suction; attraction
breathing; respiration
vampire; bloodsucker
absorption; suction; aspiration
deep breath
inhalation
adsorption
bloodsucking; sucking blood
inhalation (of air); inhaled air
suction; sucking
to inhale; to breathe in; to suck up; to soak up; to absorb
suction cup; suction pad; sucker
drawing; suction; intake
water absorption
to suck up; to absorb; to squeeze (money)
cigarette end; cigarette butt; tobacco ashes
clear broth soup, with ingredients and garnish floating in and on it
to suck up; to pump up; to draw up; to absorb; to extract
moisture absorbing