Learn English – the word for “separate into 2 parts”

terminologyword-request

I'm looking for a word which basically means "separate an object into two parts", for example, boy and girl (gender), vegan and non-vegan, extrovert and introvert.
I remembered that I have read that word somewhere, but cannot recall it now. It likes "bipolar" or "bilingual".

Best Answer

You're thinking of bisect

bisect

  • to divide into two usually equal parts:
    The new road would bisect a designated historic district.
  • geometry to divide something into two congruent (= exactly equal) parts

(Cambridge Dictionary)

However, I'm not confident that it fits the examples you gave. Bisect is used with physical things, or, in particular, geometry.

You might consider categorize or classify for the given examples.