crossing; intersection; (genetic) crossing over
copulation (among animals); mating; treading; covering; serving
exchange (e.g. cultural); interchange; interaction; alternating current; AC
company; friendship; association; society; acquaintance
police box; koban; alternation; alternating (current, stress, etc.)
mixture; intermixture; mixing up; contamination; creation of unorthodox words or phrases by combining terms of similar form or meaning
diplomacy; selling (e.g. door-to-door); canvassing
social life; social intercourse
traffic; transportation; communication; exchange (of ideas, etc.); intercourse
telecommunications; correspondence
intimacy; friendship; friendly relations
gathering; mixer; meetup; assembly; social; exchange meeting
intimacy; sexual intercourse
communication with the dead
exchange of courtesies (cordialities); fraternization; fraternisation
police mobile traffic unit
traffic conditions (e.g. heavy traffic); transportation situation (e.g. bad roads)
breaking off relations (esp. between countries)
hybridization; crossing; mixing
commissura; commissurae; commissure; commissural
doyen of the diplomatic corps
composite vessel construction (wood, iron, etc.)
alternating current and direct current; AC/DC