meaningful, significant, useful, worthwhile

(an existence of) significance, use, worth

extraordinary, unusual

very; extremely / exceedingly; tremendously

emergency

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

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

to research, to study

a piece of research, a study, investigation