DICT.TW Dictionary Taiwan

 bot·tom·less /-ləs/
 (a.)無底的;深不可測

 Bot·tom·less, a. Without a bottom; hence, fathomless; baseless; as, a bottomless abyss. “Bottomless speculations.”
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 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"