kiirustav

Kiirustav is an Estonian adjective meaning "accelerating" or "speeding up." It is formed from the verb kiirustama, which can mean to hurry or to accelerate. As a present participle-based adjective, kiirustav describes processes, actions, or phenomena whose speed increases over time and can modify nouns directly (for example, kiirustav protsess 'an accelerating process', kiirustav trend 'an accelerating trend').

In everyday and semi-technical usage, kiirustav is common when a descriptive, qualitative tone is appropriate. In strict scientific language, kiirendus is the standard term for acceleration; kiirustav is then used primarily to convey the notion of speed-up rather than to quantify it. The word may also appear in metaphorical expressions to describe rapid changes in various domains such as technology, economy, or traffic.

Etymology and grammar: kiirustav is derived from kiirustama with the typical Estonian adjective suffix -av, yielding a present participle adjective. It agrees with the noun it modifies in number, case, and definiteness, and can appear in attributive or predicative position.

See also: kiirendus, kiirus, kiirustama.