~ (about / on / over sth) (written) to think about sth carefully for a period of time
SYNCONSIDER:
[V] She pondered over his words. * They were left to ponder on the implications of the announcement. * [VN] The senator pondered the question for a moment. * We intend to ponder all the alternatives before acting. * [Vwh-] They are pondering whether the money could be better used elsewhere. [also Vspeech]
