5. The suffix -īna appended to nouns denoting persons designates a vocation or the place where it is carried on; as,—
doctrīna, teaching (doctor, teacher);
medicīna, the art of healing (medicus, physician);
sūtrīna, cobbler's shop (sūtor, cobbler).
6. Patronymics are Greek proper names denoting son of ..., daughter of .... They have the following suffixes:—
a) Masculines: -idēs, -adēs, -īdēs; as, Priamidēs, son of Priam; Aeneadēs, son of Aeneas; Pēlīdēs, son of Peleus.
b) Feminines: -ēis, -is, -ias; as, Nērēis, daughter of Nereus; Atlantis, daughter of Atlas; Thaumantias, daughter of Thaumas.
3. Nouns derived from Adjectives.
[149]. The suffixes -tās (-itās), -tūdō (-itūdō), -ia, -itia are used for the formation of abstract nouns denoting qualities; as,—
bonitās, goodness; celeritās, swiftness; magnitūdō, greatness; audācia, boldness; amīcitia, friendship.