Sebességnél
Sebességnél is a Hungarian locative construction formed from the noun sebesség (speed) with the suffix -nél. It conveys the condition or context of operating at a certain speed and is usually translated as "at speed" or "under that speed." The -nél suffix marks location or circumstance, and sebességnél can be extended by adjectives or numerals to specify the level of speed, such as nagy sebességnél ("at high speed") or alacsony sebességnél ("at low speed"). The form is common in technical, scientific, and safety-related writing, as well as in descriptive prose about motion and transportation.
In usage, sebességnél functions as a prepositional phrase that sets the conditions for the action described
Notes on nuance and alternatives: sebességnél emphasizes the situational context of speed, whereas other Hungarian expressions
See also: Hungarian locative suffixes, personality and construction of postpositional phrases in Hungarian.