from a primary tello (to set out for a definite point or goal); properly, the point aimed at as a limit, i.e. (by implication) the conclusion of an act or state (termination [literally, figuratively or indefinitely], result [immediate, ultimate or prophetic], purpose); specifically, an impost or levy (as paid):

KJV-- + continual, custom, end (-ing), finally, uttermost. Compare 5411.

This is the same word for 'end' as used in Matthew 24:14 - "The Gospel of the Kingdom shall be preached as a witness to all ethnic groups and then the end will come."