Noah Webster
Ponder
PON'DER, verb transitive [Latin pondero, from pondo, pondus, a pound; pendeo, pendo, to weigh.]
1. To weigh in the mind; to consider and compare the circumstances or consequences of an event, or the importance of the reasons for or against a decision.
Mary kept all these things, and pondered them in her heart. Luke 2:19.
2. To view with deliberation; to examine.
Ponder the path of thy feet. Proverbs 4:26.
The Lord pondereth the hearts. Proverbs 21:2.
To ponder on, is sometimes used, but is not be to countenanced.