Strong's Greek Dictionary G899
βάθος báthos, bath'-os;
from the same as G901; profundity, i.e. (by implication) extent; (figuratively) mystery
KJV Translation(s):--deep(-ness, things), depth.
The KJV NT Used G899 9 Times
depth(4x),  deep(2x),  things,  depths,  deepness.
Webster's 1828 Dictionary
deep, deepness, depth, thing

Smith's 1884 Bible Dictionary