be on firm ground
be on firm ground
To be certain of or comfortable with something. Anna can tutor you—she's on firm ground with diagramming sentences.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
be on firm ground
be sure of your facts or secure in your position, especially in a discussion.Farlex Partner Idioms Dictionary © Farlex 2017
be on firm ˈground
be sure about your beliefs, knowledge, etc.; be confident: I don’t know a lot about physics, I’m afraid. I’m on firmer ground with mathematics, which I studied at university.Farlex Partner Idioms Dictionary © Farlex 2017