Singularizing means making something singular, or changing it to be just one.
Singularizing can make things simpler or more special.
Examples:
She is singularizing the noun.
Singularizing makes it easier to understand.
The teacher is singularizing the words.
I am singularizing my collection of toys.
He is singularizing all the different colors into just one.
They are singularizing the many ideas into just one.