Strong G4491 ῥίζα rhiza · root

Luke

1. Luke 3:9
   And now also the axe is laid unto the root of the trees: every tree therefore which bringeth not forth good fruit is hewn down, and cast into the fire.
2. Luke 8:13
   They on the rock are they, which, when they hear, receive the word with joy; and these have no root, which for a while believe, and in time of temptation fall away.