NAMES OF ACTIONS AND ABSTRACT SUBSTANTIVES
a. Substantives denoting actions often express abstract idea and names of actions and verbal abstracts are often used co<*> cretely. The following suffixes (except μο, nominative -μό-ς, an ες, nominative -ος) form feminines; all are primary except ιᾱ i<*> some words.
1. τι (nom. -τι-ς): πίσ-τι-ς faith (πείθ-ω persuade, πιθ-), φά-τι-ς rumour (φη<*> say, φα-).
2. σι (nom. -σι-ς): λέξις style (λέγ-ω speak), ποίη-σι-ς poetry (ποιέ-ω make) φθί-σι-ς decay (φθί-ν-ω decay), δό-σι-ς act of giving or gift (δί-δω-μι giv<*> δο-, δω-), θέ-σι-ς placing (τί-θη-μι place, θε-, θη-), τά-σι-ς tension (fo<*> τṇ-σι-ς 35 b, from τείνω stretch, τεν-). σι is derived from τι after vowel (115).
3. σιᾱ (nom. -σίᾱ): in substantives from verbs in -αζω out of -αδ-ῖω; a<*> δοκιμασίᾱ examination (δοκιμάζω examine, δοκ μαδ-).
4. τυ (nom. -τῡ́-ς 863 a. 17): rare, poetic and dialectic, ἐδ-η-τῡ́ς eating (poet<*> ἔδ-ω eat), βοη-τῡ́-ς shouting (βοά-ω shout).
5. μο (nom. -μό-ς, masc.): διωγ-μό-ς pursuit (διώκ-ω pursue), πταρ-μό-ς sneez<*> ing (πτάρ-νυ-μαι sneeze). On θ-μο see 832, σ-μο 836, τ-μο 837. Cp 861. 1.
6. μᾱ (nom. -μη): γνώ-μη knowledge (γι-γνώ-σκω know), φή-μη report, omen (φη-μί say), τῑ-μή honour (poet. τῑ́-ω honour), μνή-μη memory (μι-μνῄ-σκω remind). See also 861. 1.
7. μᾱ (nom. -μᾰ): τόλ-μα daring (τλῆ-ναι dare).
8. ες (nom. -ος, neut.): δέ-ος fear, ῥῖγ-ος cold.
9. ιᾱ (nom. -ίᾱ): primitive, from verb-stems, as μαν-ίᾱ madness (μαίνομαι rage, μαν-). Denominative: ἡγεμον-ίᾱ sovereignty (ἡγεμών leader), εὐεργεσία kind service (εὐεργετ-ια from εὐεργέτης doer of good deeds). Without any noun-stem: πολιορκίᾱ siege (πολιορκέω besiege). Verbs in -ευω derived from substantives, as παιδεύ-ω educate (παῖς child), show abstracts in -είᾱ for ε(ῦ)-ιᾱ (43): παιδείᾱ education, στρατείᾱ campaign (στρατεύομαι take the field), βασιλείᾱ reign, kingdom (βασιλεύ-ω am king).
10. ο, α: see 859. 1, 2.
b. Many feminine substantives expressing the abstract notion of the adjective are derived from adjective stems (a few from substantive or verb stems). Many of these denominatives express quality, cp. Eng. -ness, -hood.
1. ιᾱ (nom. -ιᾰ): from adjectives in -ης and -οος, -ους, as ἀλήθεια truth for ἀληθεσ-ια from ἀληθής true; ἔνδεια want for ἐνδε(ε)σ-ια from ἐνδεής needy, 44 a, 292 d; εὔνοια kindness for εὐνο(ο)-ια from εὐνοο-ς εὔνους kind.
2. ιᾱ (nom. -ίᾱ): εὐδαιμον-ίᾱ happiness (εὐδαίμων happy), συμμαχίᾱ alliance (σύμμαχος fighting along with), σοφ-ίᾱ wisdom (σοφό-ς wise). Since τ becomes ς before ιᾱ we have ἀθανασίᾱ immortality (ἀθάνατο-ς immortal). Cp. 859. 6.
3. συνᾱ (nom. -σύνη): δικαιο-σύνη justice (δίκαιο-ς just). Abstracts in -συνη are properly fem. of adj. in -συνος, as γηθο-σύνη joy (γηθό-συνος joyful). -οσύνη by analogy in μαντ-οσύνη art of divination (μάντι-ς seer). See 865. 7.
4. τητ (nom. -της): φιλό-της, -τητος friendship (φίλο-ς friend), ἰσό-της, -τητος equality (ἴσο-ς equal), νεό-της youth (νέο-ς young), παχύ-της thickness (παχύ-ς thick).
5. αδ (nom. -άς): abstract substantives of number, as τρι-άς, -άδος triad (τρεῖς). μον-άς, -άδος unit (μόνο-ς alone, single). See also 863 b. 8.
c. Some neuter abstracts express quality: τάχ-ος speed (ταχ-ύ-ς swift), εὖρ-ος width (εὐρ-ύ-ς broad). See 840 a. 8.
d. A feminine adjective is used substantively in poet. πινυτή wisdom from πινυτό-ς wise; with recessive accent in ἔχθρᾱ enmity from ἐχθρό-ς hostile, θέρμη warmth from θερμό-ς warm.
e. Some compound adjectives in -ής yield (by analogy) abstracts in -ιᾱ not in -ειᾰ; as ἀτυχίᾱ misfortune from ἀ-τυχ-ής unfortunate. Fluctuation often occurs, as in κακοήθεια κακοηθίᾱ malignity from κακο-ήθης ill-disposed; Old Attic ἀληθείᾱ ( = Ion. ἀληθείη) for ἀλήθεια.