valtaisa
Valtaisa is a Finnish adjective meaning powerful, mighty, or imposing in size or influence. It describes objects, phenomena, or abstract notions that are large in scale or strong in impact, such as a valtaisa vuoristo, a vast organization, or valtaisa vaikutus. The nuance is one of grandeur and significance rather than merely being big.
Etymology and form: the word is built from valta, meaning power or authority, with the suffix -isa
Usage and nuance: valtaisa carries a formal or literary tone and is often used for physical magnitude
Related considerations: while valtaisa connotes substantial power or size, it is not interchangeable with all synonyms.