Definitions for "Ponder"
reflect deeply on a subject; "I mulled over the events of the afternoon"; "philosophers have speculated on the question of God for thousands of years"; "The scientist must stop to observe and start to excogitate"
not a real word but I and others use it as a synonym for pond keeper or watergardener.
Keywords:  muse, deliberate, think, followed, over
To think; to deliberate; to muse; -- usually followed by on or over.
Keywords:  weigh
To weigh.