without let or hindrance Definition

let²
noun

1. sport.
Especially racket games: an obstruction during service of the ball, shuttlecock etc, eg by the net in tennis and badminton or by an opponent in squash, requiring the ball to be served again.
2. A service affected in this way.

Idiom: without let or hindrance

Without anything hindering or preventing action or progress.

Etymology: 19c: Anglo-Saxon lettan to hinder.