kiirusel
Kiirusel is the adessive singular form of the Estonian noun kiirus, meaning speed. In Estonian grammar, the adessive case marks location on or at something, or a state related to that noun. Therefore kiirusel conveys meanings such as “at speed” or “in terms of speed,” and it is used to describe the speed at which an action occurs or the pace of something.
In usage, kiirusel commonly appears in sentences about motion or speed measurements. It is often used when
Etymologically, kiirusel is formed from kiirus (speed) with the Estonian adessive suffix -l, yielding a word