λεῖος (leîosli'-osadjectivesmooth)
[Grk] λεῖος LN: 79.86 GK: G3308 Hebrew: בִּקְעָה, חָלַק, חַלֻּק
Derivation: apparently a primary word;
Strong's: smooth, i.e. "level"
KJV: --smooth.