Dizionario Francese - Inglese

étaler in inglese:

introduce sth (over time) - They're fully functional, field-tested, ready to roll out.

The forests spread out to the horizon.

To play this game the group has to spread out into a big circle.

Our only chance of long-term survival is spread out into space.

When you look at an airplane, dihedral makes the wings appear to form a spread out V.