Dwindle

[dwin-dl] /ˈdwɪn dl/

verb (used without object), dwindled, dwindling.
1.
to become smaller and smaller; shrink; waste away:
His vast fortune has dwindled away.
2.
to fall away, as in quality; degenerate.
verb (used with object), dwindled, dwindling.
3.
to make smaller and smaller; cause to shrink:
Failing health dwindles ambition.
/ˈdwɪndəl/
verb
1.
to grow or cause to grow less in size, intensity, or number; diminish or shrink gradually
v.

1590s, apparently diminutive and frequentative of Middle English dwinen “waste away, fade, vanish,” from Old English dwinan, from Proto-Germanic *dwinanan (cf. Dutch dwijnen “to vanish,” Old Norse dvina, Danish tvine, Low German dwinen), from PIE *dheu- (3) “to die” (see die (v.)). Related: Dwindled; dwindling.