Three ! The answer is in the question !
Bisect.
It's triplet
tricolor
tri means three as in a 'tri'cycle a three wheeled bike 'tri'angle as in three angled shape a triangle has three angles so they used tri because it means three
lop
Trisect is a 7-letter word beginning with T. It means to cut into 3 parts.
The word that means cut into two parts is bisect. The root of the word comes from "bi" meaning two and "secare" meaning to cut.
The word is trisect.
"Bisect" is a word that means cut into two halves which starts with bi.
lop
cut
cut
The three later word that means view is see.
rut
slice
Bisect.