erata

Etymology
Ultimately from the same root as. The -k- is analogous; compare from.

Verb

 * 1)  to diverge

Usage notes
The forms with the weak stem are very rare and considered nonstandard (for instance, the Dictionary of Contemporary Finnish does not recognize their existence and therefore lists the verb under ); usually only the forms with the strong grade  are used, while the other forms are supplanted from.

Conjugation
The former is a more standard conjugation, with supplanted forms from (marked in italic).