Rashi would sometimes derive the meaning of a word from the meaning
of its underlying Biblical root. In applying this method Rashi would use all
available grammatical methods to study the
meanings of related roots. The next paragraph presents one such rule.
There are 1900 Biblical roots. Of these 1900 roots about half involve X-Vav-Y X-Y-Y X-Y-Hey pairs. These roots (with one root letter weak) often, but not always, have related meanings. Consequently, very often, but not
always. one can infer the meaning of a X-Y-Y root from the related X-Y-Hey or
Let us apply these principles: Throughout the Bible the Temple offerings
are referred to as being Nun-Yud-Chet-Vav-Chet to God. The root of the Hebrew word used
is Nun-Chet-Chet, which has the form XYY (the second and third root letter are identical).
The root Nun-Vav-Chet means rest.
The root Nun-Chet-Chet, according to Rashi means pleasing / satisfying.
Based on the above we would translate the many verses using Nun-Yud-Chet-Vav-Chet as meaning an offering pleasing and satisfying to God.