(idiomatic) to be vulnerable / (sumo) poor at preventing one's opponent from getting an underarm grip

defence (UK), defense (US)

defend, provide protection, cover

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

the side of something (this sense may also be spelled 傍 or 側). / a tangent, such as in a conversation

sweet, sugary, mellow / lacking saltiness / indulgent, soft / careless, lacking, lax / (figuratively) fragrant (of odor), melodious (of sound)

armpit / the other way

Alternative spelling of 傍ら (“besides; while”)