共和: collaboration; republicanism / 協和: cooperation, concord

協和: to be in concord

経典: sutra

共晶: eutectic composition / 協商: (diplomatic) agreement / 狭小: quality of being narrow / 胸章: a badge / 胸墻: breastwork / 橋床: the deck of a bridge / 競翔: pigeon racing / 強将: a strong leader, a brave general

狭小: narrow, small

お勉強: studying, studies, study

cause-and-effect relationship; causality

consanguinuity

love triangle, eternal triangle / triangle relation, three-cornered relationship

relative pronoun