喘息 is read as ぜんそく (zensoku) and means asthma.
ぜんそく
zensoku
ぜんそくほっさ
asthma attack
ぜんそくがおこる
to have an attack of asthma
きかんしぜんそく
bronchial asthma
しょうにぜんそく
infantile asthma
あすぴりんぜんそく
aspirin-induced asthma
しょうそく
(someone's) whereabouts
りそく
interest (on a loan, deposit etc.)
いき
breath
ちっそく
suffocation
きゅうそく
rest
はないき
nasal breathing
ひといき
one breath