どうぞ

Etymology
From.

Adverb

 * 1)  no matter how; by all means; seriously
 * 2)  please (go ahead); help yourself; certainly you may; here you are
 * 1)  please (go ahead); help yourself; certainly you may; here you are
 * 1)  please (go ahead); help yourself; certainly you may; here you are

Interjection

 * 1)  over