Where does “existimaturus” come from?

existimaturus (Latin) comes from Latin existimō, from Latin aestimō, from Latin aestumo — to value, rate, esteem.

existimaturus (Latin): about to value

Definitions

Step	Language	Word	Meaning
1	Latin	existimō	to value, or esteem, estimate, reckon, consider [with of quality rare]
2	Latin	aestimō	to determine the value of something; value, price, rate, appraise, assess; estimate, reckon, consider, judge
3	Latin	aestumo	to value, rate, esteem