állandóval
Állandóval is a Hungarian instrumental case form of the adjective állandó, meaning constant or permanent. It is used to express means, accompaniment, or method in a sentence, and it also appears in technical language, including mathematics and science, to indicate that a quantity is applied or adjusted by a constant. The form is common in everyday speech and in formal writing.
Formation and usage: The suffix -val (or -vel after front vowels) is attached to the stem állandó
Examples: In everyday language one could encounter phrases like a mérnök a mérésekhez állandóval korrigálja az
Notes: Állandóval belongs to the Hungarian instrumental case system (-val/-vel) and is primarily a grammatical tool