In historical (or diachronic) linguistics, subjectification (also known as subjectivization or subjectivisation) is a language change process in which a linguistic expression acquires meanings that convey the speaker's attitude or viewpoint. ... Subjectification is realized in lexical and grammatical change.

What does Subjectify mean?

: to identify with a subject or interpret in terms of subjective experience.

Is Completability a word?

The condition of being completable.