Challenging and Throw down the gauntlet to

Challenging adjective - Requiring considerable physical or mental effort.

Throw down the gauntlet to and challenging are semantically related. In some cases you can use "Throw down the gauntlet to" instead a verb "Challenging".

Nearby Words: challenge, challenged, challenger

Challenging and throw down the gauntlet to are semantically related. Sometimes you can replace term "Challenging" with "Throw down the gauntlet to", this words are similar.