have a (good/solid/sound/etc.) grasp of/on (someth

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have a (good/solid/sound/etc.) grasp of/on (something)

To have a firm, clear understanding or determination of something. I hope everyone has a solid grasp of the material, as you'll be tested on it next week. I thought I had a pretty good grasp on English idioms, but I don't understand this one at all!

See also: grasp, have, of, on, solid, sound

Common Names:

Name	Pronounced	Usage
Bret	BRET	English
Piia	PEE:-ah	Finnish
Batsheva	-	Hebrew
Adriana	ahd-RYAH-nah (Italian, Spanish, Polish), ayd-ree-AN-ə (English)	Italian, Spanish, Portuguese, Romanian, Polish, Czech, Slovak, English
Ezekias	-	Biblical Greek
Dean	[di:n]