constriction

kənˈstrɪkʃn

noun

the action of making something narrower by pressure or of becoming narrower; tightening.

asthma is a constriction of the airways

tightening,narrowing,shrinking,squeezing,tightness,pressure,compression,contraction,cramp,obstruction,blockage,impediment,congestion,choking,strangulation,stricture,stenosis,straitening