To speculate is to hypothesize or come up with a theory about something but not a full tested or researched answer.
To engage in meditation regarding (a religious mystery, for example).
To mull is to ponder over or think about something for a long time.
To ruminate is to think seriously or deeply about something.
The definition of contemplate is to look at something, think about something or meditate about something for a long time.
To bring blame or discredit:
To reflect or consider with thoroughness and care.
Find another word for mull-over. In this page you can discover 11 synonyms, antonyms, idiomatic expressions, and related words for mull-over, like: speculate, think over, meditate, mull, ruminate, chew-over, excogitate, contemplate, muse, reflect and ponder.