to exchange (words, fire, etc.)

alternation; change; relief; relay; shift; substitution (sports, etc.); taking turns

to be mixed; to be blended with; to be combined

crossing; intersection

to fly about; to flutter about; to flit about; to fly past each other

to exchange (messages, greetings, arguments, etc.)

to mix (with); to be mixed (together); to be mingled

exchange of courtesies (cordialities); fraternization; fraternisation

mixed with; mingled with; interspersed with; dashed with; sprinkled with

to mix; to stir; to blend

diplomacy

alternating current; AC