jalÄsa
This is the word for a greeting or welcome.
anlÄsi
This is the collective form, which is used far more often. It can refer to a set of greetings, or it can be the greeting itself.
selre anlÄsi;
I give you greetings.
λi tÄ“rranni selirte anlÄsi;
Greetings, Earthlings!
(or more literally, “Terrans, I give you(pl) greetings.”)