Abbreviation of 師.

principal or headteacher of a school

serve as one thing and another at once

find it difficult to do, be unable to do

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

school (institution dedicated to teaching and learning)

could happen / might happen / likely to happen / possible / not be surprising if

to find it difficult to; to be unable to