dominant eye　(only applies to 利き目) / efficacy, effectiveness (only applies to 効き目)

prying eyes; people who may be watching / the quality of being perceptive, observant / appearance, look

cardboard (corrugated)

tennis (sport played by two or four players with strung racquets)

to use / to employ / to make use of, to apply / to spend

Alternative form of 効く

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

to see, to watch, to observe, to look at something / to look over, to examine, to judge / to take care of, to look after, to keep an eye on somebody