opastavalt
Opastavalt is a term that appears rarely in Estonian-language texts and is not found in standard dictionaries. Because it lacks broad attestation, it is generally treated as a nonstandard form, most often considered a misspelling or a very regional/obscure variant of the word vastavalt, which means “according to” or “in accordance with.” In formal writing, opastavalt is not recommended.
Etymology and morphology aside from standard usage are unclear. Estonian adverbs of manner commonly end with
Usage notes and guidance: In contexts where precision is important, readers should prefer vastavalt, which has
See also: vastavalt, Estonian adverbs with the suffix -valt, orthographic variations.