(mathematics) quod erat demonstrandum (that which was to be proved)

(product development) project

project (planned endeavour)

declaration

to declare

end, conclusion / end-of-life, death

to end, to finish, to quit / to be in a hopeless position

end; conclusion; finish / death; collapse; fall

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