-utus

Found in Classical Latin, as a surface-level ending rather than suffix of its own, in:

• Adjectives based on a noun with a stem that ends in -u- + -tus (astūtus, cornūtus, verūtus)

• Perfect participles of third-conjugation verbs ending in -uō, -uor, or -vō (acūtus, locūtus, solūtus)

Found as an independent suffix, no longer constrained to the above environments, after Classical times. Compare -ātus and -ītus.

-ūtus (feminine -ūta, neuter -ūtum); first/second-declension suffix

1. (Late Latin) Attaches to nouns to forms adjectives with the sense of '(prominently) characterized by [noun]'.
2. (Early Medieval Latin)? Forms the past participle of second– or third-conjugation verbs.

First/second-declension adjective.