sacerrimus

• (Classical Latin) IPA^(key): /saˈker.ri.mus/, [s̠äˈkɛrːɪmʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /saˈt͡ʃer.ri.mus/, [säˈt͡ʃɛrːimus]

sacerrimus (feminine sacerrima, neuter sacerrimum, positive sacer); first/second declension

1. superlative degree of sacer; most or very sacred
   • Seneca the Elder, Suasoriae 6.1:

     M[ārcus] Catō, sōlus maximum vīvendī moriendīque exemplum, morī māluit quam rogāre (nec erat Antōnium rogātūrus), et illās usque ad ultimum diem pūrās ā cīvīlī sanguine manūs in pectus sacerrimum armavit.

     Marcus Cato, alone our noblest pattern in life and in death, chose to die rather than beg for mercy - yet it was no Antony he had to petition - and armed those hands of his, to the last unstained by Roman blood, against his own noble breast.

First/second-declension adjective.