"Give a lei!"
Okay, so correct me if I'm wrong, but from what I can see: "e" indicates the imperative, and "lei" means garland/lei (traditional hawaiian flower necklace) and is also used as a verb to mean "give a lei". This is quite interesting.
In that regard, you are handing the lei to them to hold, while E lei would imply that you are putting it on them to wear.
So how can one word "lei" be used as a verb AND a noun at the same time. And someone tell me exactly where they found the meaning "give a lei".
That is addressed above - E hā'awi i ka lei implies that you are handing a lei to a person to hold and E lei implies that you are putting the lei on the person to wear, that context of giving a lei.