membrane; film

bone marrow

bone marrow / the pith of a plant / (figuratively) the pith or essence of something, such as a skill or cultural thing

(archaic, possibly obsolete) the center of something / (archaic, possibly obsolete) something straight / (archaic, possibly obsolete) an exact direction, an immediate area

(archaic, possibly obsolete) bone marrow

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

fall ill, contract a disease

membrane; film