Real Spellers

English Makes Sense!

From our beloved etymonline:

suffix forming nouns from verbs, from L. -tionem, accusative of noun suffix -tio (gen. -tionis) forming nouns of condition and action (the -t- is the Latin pp. stem).

What do you make of that explanation? :-(

Word sums for the next installment of Scientifically Speaking:
re + fract + ion  --> refraction
prism (base)
lens (base)
con  +  cave  --> concave
con  +  vex  --> convex
Let me know if I have made errors!

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