What is the meaning of Ehk?

Refers to a hypothetical or hoped-for possibility that is not entirely certain: perhaps, maybe

Occurs in modest speech, especially when making a wish or a request.

a.k.a., or

Connects words that are synonymous, that mean the same thing or that are used in the same context.

Connects two expressions, the latter explaining the former or conveying it in other words.

or

Source: wiktionary.org