(mathematics) real number field

body / physique, constitution, frame / health

a real number (limit of a convergent sequence of rational numbers)

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

deep, profound

a piece of research, a study, investigation

to research, to study

deep, close, thick, profound