on solid ground

Prepositional phrase

1. (idiomatic) Confident or justified regarding a subject or argument.
   • He's on solid ground when he's analyzing the pros and cons of convertible debentures.

   Synonyms:

   well-grounded, well-founded

   Antonyms:

   ill-grounded, ill-founded, groundless, baseless, flimsy, unjustified

2. (idiomatic) In a safe and secure position.
   • Our department is on solid ground if the company starts flirting with the idea of layoffs; some other departments are in shakier positions.
3. Used other than figuratively or idiomatically: see on, solid, ground: not on top of anything that is likely to give way or disintegrate (e.g., loose soil, shaky structures, water, an ice road, clouds).
   • Mr and Mrs Liu got caught in the flood that ripped through their low-lying neighborhood. "We're just thanking God that we're back on solid ground," Mr Liu told this reporter. "We were clinging to a log at one point."