forsing

In obsolete|lang=en terms the difference between exhaust and forsing

is that exhaust is (obsolete) exhausted; used up while forsing is (obsolete) to exhaust (oneself) with singing.

As verbs the difference between exhaust and forsing

is that exhaust is to draw or let out wholly; to drain off completely; as, to exhaust the water of a well; the moisture of the earth is exhausted by evaporation while forsing is (obsolete) to exhaust (oneself) with singing.

As a noun exhaust

is a system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system.

As an adjective exhaust

is (obsolete) exhausted; used up.