Source : Webster's Revised Unabridged Dictionary (1913)

Bottomless \Bot"tom*less\, a.
   Without a bottom; hence, fathomless; baseless; as, a
   bottomless abyss. ``Bottomless speculations.'' --Burke.

Source : WordNet®

bottomless
     adj 1: extremely deep; "a bottomless pit"; "a bottomless lake"
     2: having no bottom; "bottomless pajamas consisting simply of a
        long top opening down the front" [ant: {bottomed}]
     3: having no apparent limits or bounds; "a bottomless supply of
        money"; "bottomless pockets"
     4: unclothed especially below the waist or featuring such
        nudeness; "bottomless dancers"; "a bottomless bar"