in one's element

in one's element

1. In a situation which is entirely suitable, familiar, or enjoyable.

   Synonym: at home

   Antonym: out of one's element

   You can tell he's completely in his element when he's talking about fossils.

   • 2019 April 10, qntm, “CASE HATE RED”, in There Is No Antimemetics Division, →ISBN, page 137:

     And finally it's time, and he's out there, under the spot, in his element. The first piece of the night is Shostakovich. Its first movement is a sedate, haunting, almost melodramatic nocturne, but before too long the concerto changes gear and becomes energetic, discordant, feral.

• like a duck takes to water
• up someone's alley
• out of one's depth