be on firm ground

Putin is a dangerous man - we need to ensure we tread on firm ground when we act, says Bob Seely
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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.
See also: firm, ground, on
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.
See also: firm, ground, on
Farlex Partner Idioms Dictionary © Farlex 2017
be on firm ;ground 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.
See also: firm, ground, on
Farlex Partner Idioms Dictionary © Farlex 2017
See also:
be on solid ground
firm hand on the tiller
tiller
have a firm grip on (someone or something)
keep a firm grip on
keep a firm grip on (someone or something)
firm
it's a question of (something)
it's a question of something
grip on (something)