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undemonstrative
undeniable
under
under-
under-the-counter
under-the-table
under way
under weigh
underachieve
underachiever
underact
underadvance
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underachieve

un·der·a·chieve [ ùndərə chv ] (past and past participle un·der·a·chieved, present participle un·der·a·chiev·ing, 3rd person present singular un·der·a·chieves)


intransitive verb 
Definition:
 
fail to do as expected: to fail to fulfill your potential or somebody's expectations


un·der·a·chieve·ment noun
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