birk

1. (Northern-England) A birch tree.
2. A Eurasian minnow (Phoxinus phoxinus, syn. Leuciscus phoxinus).

Pronounced as (IPA)

/bɜː(ɹ)k/

Etymology

Inherited from Middle English: birk

Cognate with Middle English: birche

In summary

From Northern Middle English birk, birke, byrke (“birch”), (southern Middle English birche). More at birch.
(tree): Cognate with Scots birk.