blow, breathe, puff, emit, smoke
吹 centers on moving air with the mouth: blowing, breathing out, or puffing. The extended senses of emitting and smoke come from the idea of air carrying something outward.
吹 combines 口 (mouth) and 欠 (open mouth, exhale), suggesting the act of blowing air from the mouth.
The left side is a mouth 口, and the right side 欠 looks like a person exhaling. Picture a mouth blowing out a puff of air.
For スイ, imagine blowing a sweet puff of air that carries the scent of candy: sweet -> スイ, and the mouth 口 blows it out.
to blow (of the wind)
wind music; wind instrument music
blowing (e.g. of the wind)
indicates that the action is done forcefully
dubbing (of a film, etc. into a different language)
snow storm; blizzard
speech balloon (in a comic strip); speech bubble
spouting (of a whale); blowing (water and air)
to be blown off; to be blown away; to go flying
Chinese juniper (Juniperus chinensis)
to blow away; to blow off; to blow up
atrium; well (in building); vault
to be blown off; to blow off; to blow away
breath
kerria (Kerria japonica); Japanese yellow rose
to blow in (of wind, rain, etc.)
spreading around (news, rumor, etc.); making widely known; making public; publicizing; proclaiming
flute player; flutist; flautist; piper
blowing in
to spout out; to spurt out; to gush out; to jet out