ponder on (something)

ponder on (something)

To give great consideration to something; to ruminate or think about something very deeply. We sat pondering on various ways to improve our business model when Janet suddenly came up with a brilliant idea. Well, you're review has certainly given me plenty to ponder on.
See also: on, ponder
Farlex Dictionary of Idioms.

ponder (up)on something

to think on something; to consider something. (Upon is formal and less commonly used than on.) Ponder upon this awhile. See what you come up with. I need to ponder on this.
See also: on, ponder
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • a straw will show which way the wind blows
  • a crack at (someone or something)
  • all right
  • (you) wanna make something of it?
  • all for the best
  • a thing of the past
  • a slew of (something)
  • a bird in the hand