Origin of instarModern Latin ; from Classical Latin a shape, form ; from instare: see instant
transitive verbin·starred, in·star·ring, in·stars
Origin of instarNew Latin īnstar, from Latin, image, form.
From Latin instar (“form, likeness”).
(third-person singular simple present instars, present participle instarring, simple past and past participle instarred)
in- + star