elan [ə`lɑn] noun.

1. Enthusiastic, vigorous vim or liveliness.
2. A unique design or style; flair.

[Fr. French
élan, fr. Old French eslan, to rush, hurry fr. eslancer, to fling: es, out, from Latin ex, & lancer, to throw fr. Late Latin lancāre, to hurl a lance fr. lancea, a lance, possibly Celtic origin]