From ca'aph; divided (in mind), i.e. (concretely) a skeptic -- thought.
see HEBREW ca'aph
H5588. seeph
II. [סֵעֵף] (Köii. 106) adjective divided, half hearted; — plural absolute as substantive, in religious sense, שָׂנֵאתִי סֵעֲפִים Psalm 119:113 half-hearted ones do I hate.