Where does “תְּמִימוּת” come from?

תְּמִימוּת (Hebrew) comes from Hebrew תָּמִים — honest.

Ancestry of “תְּמִימוּת”, step by step

Step	Language	Word	Meaning
1	Hebrew	תָּמִים	honest

תְּמִימוּת — Etymology, Origin & Word History | Etymology Explorer