Noun underlay has 1 sense
  1. carpet pad, rug pad, underlay, underlayment - a pad placed under a carpet
    --1 is a kind of pad
    --1 has particulars: underfelt
,Verb underlie has 3 senses
  1. underlie - be or form the base for
    --1 is a kind of
    raise, lift, elevate, get up, bring up; be; raise, lift, elevate, get up, bring up; be
    Sample sentences:
    Somebody ----s something
    underlie
    Something ----s something
    underlay
    Somebody ----s something
    underlie
    Something ----s something
  2. underlie - lie underneath
    --2 is a kind of
    put, set, place, pose, position, lay; lie; put, set, place, pose, position, lay; lie
    Derived form: noun underlayment1
    Sample sentences:
    Somebody ----s something
    underlie
    Something ----s something
    underlay
    Somebody ----s something
    underlie
    Something ----s something
  3. underlay - provide with a base, support, lining, or backing; "underlay the boards with joists"
    --3 is a kind of provide, supply, ply, cater; provide, supply, ply, cater
    Sample sentences:
    Somebody ----s something
    2 senses of underlie
    underlay
    Somebody ----s something
    2 senses of underlie
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