The verb mull means to think deeply about something, the way you might mull over your choice of what college to attend.

When you mull something over, you ponder or seriously consider it. You could mull over what aid organization to donate money to following a natural disaster, or mull over what to study in college. People are most likely to mull over important decisions, but you can use the word mull, almost always with over, any time you're giving serious consideration to something. A completely different meaning of mull is "to heat, sweeten, and spice," as when you make mulled cider.

Definitions of mull
  1. verb
    reflect deeply on a subject
    “I mulled over the events of the afternoon”
    synonyms: chew over, contemplate, excogitate, meditate, mull over, muse, ponder, reflect, ruminate, speculate, think over
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    think or reflect beforehand or in advance
    theologise, theologize
    make theoretical speculations about theology or discuss theological subjects
    reflect on one's own thoughts and feelings
    consider or ponder something carefully
    consider carefully and deeply; reflect upon; turn over in one's mind
    question, wonder
    place in doubt or express doubtful speculation
    be uncertain about; think about without fully understanding or being able to decide
    consider, study
    give careful consideration to
    factor, factor in, factor out
    consider as relevant when making a decision
    compare, equate, liken
    consider or describe as similar, equal, or analogous
    have doubts about
    type of:
    cerebrate, cogitate, think
    use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments
  2. verb
    heat with sugar and spices to make a hot drink
    mulled cider”
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    type of:
    dulcify, dulcorate, edulcorate, sweeten
    make sweeter in taste
  3. noun
    a term used in Scottish names of promontories
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    type of:
    foreland, head, headland, promontory
    a natural elevation (especially a rocky one that juts out into the sea)
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