Indefatigable
A reader asks about the words fatigable, defatigable, and indefatigable: Indefatigable apparently is of the same/identical meaning [as defatigable]. Then why is the ‘in’ used as a prefix of defatigable, when ‘in’ is generally used to invert the meaning, as in ‘incorrigible’ (antonym of corrigible)? The reader says that he understands fatigable to refer to … Read more