410. With the suffix -ο (cp. § 403) are formed some words that may be used as adjectives or nouns at will. As adjectives some have a feminine in -ᾱ (cp. § 404), others are of two endings. Not a few such adjectives (or nouns) are used as the second part of a compound (§ 446.c), though not found separately.
| Adjective | Verb | 
| λοιπ-ός (ή, -όν) left, remaining | λείπω (λειπ-) leave | 
| ἀγωγ-ός leading, guide (redup.) | ἄγω drive, lead | 
| -ποι-ός making (§ 400.d) | ποιέω (ποιε-) make | 
| -μάχ-ος fighting | μάχομαι (μαχ-) fight | 
| -ηγ-ός leading | ἄγω (ἀγ-) drive, lead | 
| -φόρ-ος bearing | φέρω (φερ-) bear | 
| -ήκο-ος hearing (§ 27) | ἀκούω (ἀκου-) hear | 
411. The verbals in -το-ς and -τέο-ς, made from most verbs, have been briefly described (§§ 352 – 354). Those in -το-ς have a wide range of meaning, usually passive, sometimes active, in some cases resembling a perfect active participle.
| Adjective | Verb | 
| δυνα-τός able (act.), possible (pass.) | δύναμαι (δυνα-) can | 
| πλανη-τός wandering | πλανάω (πλανα:η-) wander | 
| τλη-τός enduring, endurable | τλάω (τλα:η-) endure | 
| πισ-τός trustworthy, faithful | πείθω (πιθ-) win, trust | 
| κροτη-τός pounded or rattling | κροτέω (κροτε:η-) pound | 
| ὕπ-οπ-τος suspected or suspicious[fn]Cp. the two meanings of suspicious in a suspicious man and a suspicious circumstance.[/fn] | ὑπ-όψομαι (ὑπ-οπ-) shall eye stealthily | 
| ἄ-πρᾱκ-τος undone or having done nothing (§ 440) | πρᾱ́σσω (πρᾱγ-) do | 
412. Many verbal adjectives, active, passive, or indeterminate, are formed with the suffixes
| Suffix | Nominative | ||||
| -νο | or | -ανο, | -(α)νός | -ή | -όν | 
| -λο | -ελο, | -(ε)λός | -ή | -όν | |
| -ρο | -ερο, | -(ε)ρός | -ᾱ́ | -όν | |
| Adjective | Verb | 
| στυγ-νός hateful, hated | στυγέω [root στυγ- (στυγε-)] hate | 
| σεμ-νός (for σεβ-νος) revered, solemn | σέβομαι (σεβ-) revere | 
| δει-νός fearful | δέδοικα (δι-, δει-, δοι-) fear | 
| τερπ-νός delightful | τέρπω (τερπ-) delight | 
| ἱκ-ανός sufficient, capable | ἱκνέομαι (ἱκ-) arrive | 
| πιθ-ανός persuasive | πείθω (πιθ-, πειθ-) win over | 
| δει-λός (cp. δεινός) timid | δέδοικα (δι-, δει-, δοι-) fear | 
| στυφ-ελός compact | στῡ́φω (στυφ-) draw together | 
| ἐχθ-ρός hateful, hating | ἔχθω (ἐχθ-) hate | 
| λαμπ-ρός splendid | λάμπω (λαμπ-) shine | 
| μελετη-ρός practising, practised | μελετάω (μελετα:η-) practise | 
| ἰσχῡ-ρός strong | ἰσχω (ἰσχῡ-) be strong | 
| βλαβ-ερός harmful | βλάπτω (βλαβ-) harm | 
| φαν-ερός plain | φαίνω (φαν-) show | 
| στυγ-ερός (cp. στυγνός) hateful, hated | 
a. Some nouns formed with like suffixes are closely related to these, and may have been originally adjectives.
413. Other suffixes that form verbal adjectives are
a. -υ, nominative -υς, εια, -υ.
| Adjective | Verb | 
| ἡδ-ύς pleasing | ἥδομαι am pleased (ἡδ-) | 
(In ταχ-ύς (swift), βαρ-ύς (heavy), and others, the root does not appear in Greek as a verb stem.)
b. -εσ, nominative -ης, -ες.
| Adjective | Verb | 
| ψευδ-ής false | ψεύδομαι (ψευδ-) lie | 
(Many adjectives in -ης are compounds; see §§ 446, 447.)
c. -μον, nominative -μων, -μον.
| Adjective | Verb | 
| τλή-μων enduring, wretched | τλάω (τλα:η-) endure | 
| μνή-μων mindful | μιμνήσκω remind (μνη-) | 
| αἰδή-μων respectful | αἰδέομαι respect | 
| ἐπι-λήσ-μων forgetful | ἐπι-λανθάνομαι (λαθ-, ληθ-) forget | 
Here belong also some nouns in -μων.
| Noun | Verb | 
| ἡγε-μών leader | ἡγέομαι (ἡγε:η-) lead | 
d. -ικο, nominative -ικός, -ή, -όν, often suggesting inclination to or fitness for an action (cp. § 425).
| Adjective | Verb | 
| ἀρχ-ικός fit to rule | ἄρχω rule (ἀρχ-) | 
| γραφ-ικός suited to writing or painting | γράφω (γραφ-) write or paint | 
e. -τικο (nominative -τικός, -ή, -όν) developed from -ικο, by use with verbals in -τος.
| Adjective | Verb | 
| πρᾱκ-τικός inclined to act | πρᾱ́σσω (πρᾱγ-) do | 
| λογισ-τικός skilled in reckoning | λογίζομαι (λογιδ-) reckon | 
| γυμνασ-τικός fond of excercise | γυμνάζω exercise | 
| σκεπ-τικός disposed to examine | σκέπτομαι lοοk carefully (σκεπ-) | 
f. -ιμο and -σιμο, nominative -(σ)ιμος, -η, -ον:
414. The various participles are special classes of verbal adjectives.
 
     
