The Meaning of θεότητος in Colossians 2:9

ὅτι ἐν αὐτῷ κατοικεῖ πᾶν τὸ πλήρωμα τῆς θεότητος σωματικῶς (Colossians 2:9 NA27). 

In majority of extant Greek manuscripts, we have theotes (deity) in the genitive case: theotetos (''of deity''). 

The Greek noun Theotetos etymologically came from the Greek noun theos and suffix -tes. The addition of the suffix -tes to theos makes it an abstract noun: theotes. Compare the abstract noun ‘adelphotes’ (brotherhood) in 1 Peter 2:17 with ‘theotes’ (godhood). 

The Greek suffix '' -tes'' refers to "state/quality/idea".

The Greek noun ''theos'' refer to ''god /God''. 

Therefore, theotes literally means ''the state of being God/god / the idea of what God is/ the quality (nature) of God''. The quality (nature) of God refers to what makes God God. In this case, the Greek phrase πᾶν τὸ πλήρωμα τῆς θεότητος can be literally translated as: all the fullness of what makes God God.

Footnotes:

[1]  theotes (“deity”) is in the nominative case. 

Compare the abstract noun ‘adelphotes’ (brotherhood) in 1 Peter 2:17 with ‘theotes’ (godhood) in Colossians 2:9.