social standing, (social) status, (social) class

quickness, rapidity

researcher

responding to an emergency

suspension of studies, absence from school while remaining on the register, especially due to illness

temporary business closure

super express (very rapid transportation, particularly of trains)

tightness, rigidity, uncomfortableness / narrowness / illiberality, oppressiveness, uncomfortableness

suction; absorption; assimilation / merger

a classmate (student of the same class) / a schoolmate who attends school in the same year