to feel / to sense / to experience

isolation, separation / (chemistry) isolation

to isolate, to separate / (chemistry) to isolate

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

society (group of people sharing culture) / a class, a world of a certain group

(idiomatic) to feel inferior, to feel small

(chemistry) free radical

(biochemistry) free fatty acid