呼吸【こきゅう】
breathing, respiration, knack, trick, secret (of doing something), harmony, balance, synchronization, accord, short interval, short pause
吸収【きゅうしゅう】
absorption, suction, attraction
吸い殻【すいがら】
cigarette end, cigarette butt, tobacco ashes
吸い込む【すいこむ】
to inhale, to breathe in, to suck up, to imbibe, to absorb, to soak up
吸引【きゅういん】
absorption, suction, aspiration, attraction, draw
吸う【すう】
to smoke, to breathe in, to inhale, to suck, to sip, to slurp, to absorb, to soak up, to kiss
吸入【きゅうにゅう】
inhalation