On gloss:

grasu in sense "grease"
x1 is a quantity of/is made of/contains grease/fat/oil from source x2.
plana in sense "obese"
x1 is plump/fat/obese [excessively thick/bulbous/swollen] by standard x2.

On affix form:

fatne
x1 [sequence] is in reverse order from x2 [sequence]; x1 (object) is inverted from x2 (object).

In definition:

ga'arpatlu
x1 is a french-fried potato of variety/cultivar x2 cooked in fat/oil x3

In notes:

matne
x1 is a quantity of/contains butter/oleo/margarine/shortening from source x2.
se'ircti
x1 (partially) eats itself/performs autophagy.