The phrase "intimidating appearance" means that someone or something looks scary or tough, which makes others feel afraid or less confident. Full definition
In spite of her somewhat intimidating appearance she is a very gentle creature and also quite a celebrity. (naturemuseum.org)
Also included in the bundle are 20 inch chrome wheels or black if you prefer a more intimidating appearance. (thesupercars.org)
Despite their somewhat intimidating appearance, members of this breed are generally quiet and not particularly active, making them ideal for living in a small space. (breeders.net)