kütuseks

Kütuseks is the translative form of the Estonian noun kütus, meaning fuel. The form indicates that something is used as fuel, or is designated for use as fuel, or has undergone a transformation into fuel. It is commonly used to express purpose or function, particularly in technical, policy, or energy-related texts.

In usage, kütuseks can accompany nouns naming materials or products to show their role as fuel. It frequently appears in constructions such as “on kütuseks sobiv” (is suitable as fuel) or “saab kütuseks kasutada” (can be used as fuel). The form answers questions about purpose or resultant state, such as “for use as fuel” or “into fuel.”

Etymology: kütuseks combines the base kütus (fuel) with the translative suffix -eks, which marks a change of state or designation, here meaning “as fuel” or “for use as fuel.” The morphological form is primarily encountered in written Estonian, especially in technical or environmental contexts.

See also: kütus.