to reduce the amount of, as if by whittling; pare down; take away by degrees (usually followed by down, away, etc.): to whittle down the company's overhead; to whittle away one's inheritance.
verb (used without object)
5.
to whittle wood or the like with a knife, as in shaping something or as a mere aimless diversion: to spend an afternoon whittling.
6.
to tire oneself or another by worrying or fussing.
1550s, "to cut thin shavings from (something) with a knife," from M.E. whittel "a knife" (c1400), variant of thwittle (late 14c.), from O.E. þwitan "to cut," from P.Gmc. *thwitanan (cf. O.N. þveita "to hew"). Figurative sense is attested from 1746. Related: Whittled; whittling.
Whittle (wĭt'l) Pronunciation Key
British aeronautical engineer and inventor who developed the first aircraft engine powered by jet propulsion in 1937.