Godan verb with 'u' ending, Transitive verb
to breathe in; to inhale; to smoke (a cigarette, etc.)
教室でどうどうとタバコをすう高校生たちとそれを注意できない教師たちは罰を受けることになります。High school students who flagrantly smoke in class and the teachers who can't caution them will be punished. to suck; to sip; to slurp
to absorb; to soak up
to kiss
Also written 喫う【すう】