plumb - definition and synonyms

verb [transitive] 

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/plʌm/
present tense
I/you/we/theyplumb
he/she/itplumbs
present participleplumbing
past tenseplumbed
past participleplumbed
  1. 1
    formal to manage to understand something difficult or mysterious

    science’s attempts to plumb the mysteries of the universe

phrasal verbs