to attribute (esp something bad) to somebody, often unjustly
to attribute (something) to a specified source or cause
to assign (a notional value) to something of unknown value
imputable adj
imputation /-ʹtaysh(ə)n/ noun
imputative /-tətiv/ adj
[Middle English inputen from Latin imputare, from in-2 + putare to think, consider]