loom - definition and synonyms

verb [intransitive] 

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/luːm/
present tense
I/you/we/theyloom
he/she/itlooms
present participlelooming
past tenseloomed
past participleloomed
  1. 1
    to appear as a large shape that is not clear, usually in a threatening way
    loom above/over/up/out of:

    Suddenly the mountains loomed up out of the mist.