mélyén
Mélyén is a Hungarian locative expression formed from the adjective mély (deep) with the locative suffix -én. It functions as a noun-like phrase meaning “in the depths” and is used to indicate the interior or hidden part of something, either in a literal sense (the ocean, a cave, the earth) or in a figurative sense (the depths of the psyche, a mystery). The phrase typically follows a noun, as in a tenger mélyén or a föld mélyén, and can also occur in constructions such as valaminek a mélyén.
Etymology and form: The term combines mély with the postposition-like suffix -én to express location within
Usage and examples: Mélyén frequently appears in literary and descriptive prose. Examples include: A tenger mélyén