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挨拶， あいさつ
1. greeting, greetings, salutation, salute, polite set phrase used when meeting or parting from someone
2. speech (congratulatory or appreciative), address
3. reply, response
4. courtesy visit (to offer condolences, say congratulations, pay respect, ...
问候语，问候，致意，致敬，见面或分别时使用的礼貌固定用语；演讲(祝贺性或感谢性)，致辞；礼节性拜访(表示哀悼、致以祝贺、表达敬意、自我介绍等)
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を
1. indicates direct object of action
2. indicates subject of causative expression
3. indicates an area traversed
4. indicates time (period) over which action takes place
5. indicates point of departure or separation of action
6. indicates object of d...
表示动作的直接对象；表示经过的场所；表示离开或分开的点
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交わす， かわす
1. to exchange (messages, greetings, arguments, etc.)
2. to intersect, to cross, to interlace
3. ... with one another, ... to each other
交换，互换