lip-read - definition and synonyms

verb [intransitive/transitive] 

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/ˈlɪp ˌriːd/
present tense
I/you/we/theylip-read
he/she/itlip-reads
present participlelip-reading
past tenselip-read
past participlelip-read
  1. to look at someone’s lips in order to understand what they are saying because you cannot hear them

derived word

lip-reading

noun [uncountable]