mull - definition and synonyms

verb 

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/mʌl/
present tense
I/you/we/theymull
he/she/itmulls
present participlemulling
past tensemulled
past participlemulled

phrasal verb

mull over

[transitive]
present tense
I/you/we/theymull over
he/she/itmulls over
present participlemulling over
past tensemulled over
past participlemulled over
to think carefully about something over a period of time

They’ll need time to mull over the proposals.