bir-

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Prefix

A [[variant]] of {{m|en|bi-|t=two}}, used before a root beginning with a [[vowel]] (for example, {{m|en|aryl}} as in [[biraryl]]) to aid [[pronunciation]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.