to keep up; to retain / to maintain

backbone (series of vertebrae that encloses the spinal cord)

every day; daily

everyday life; daily life

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

hard, tough, stiff / stubborn

against one's will

athletics, exercise / (politics) movement, drive, campaign / (physics) movement