The suffix -s- accompanied by mutation derives verbs from substantive and adjective stems: blētsian 'bless' < *blēdsian (from blōd 'blood'; the original meaning was 'sprinkle with blood'); clænsian 'cleanse' (from clæne 'clean'), mærsian 'announce' (from mære 'famous'); ™rimsian 'rage'.
The suffix-læc- (with mutation from -lāc-) also derives verbs: nealæcan 'approach', ™erthtlæcan 'acquit'.
The prefix ā- meaning 'out of, 'from' is found, for instance, in the verbs ārīsan 'arise', āwacan 'awake', āberan 'sustain', ābys™ian 'occupy'. A productive prefix.
A different prefix –ā(connected with the adverb ā 'always') derives generalizing pronouns and adverbs from interrogative ones, e. g.: āhwær 'everywhere' (from hwær 'where') āhwæþer 'either' (from hwæþer 'which of the two').
The same prefix followed by the prefix ™i- yields*ā™i- > æ™- (with mutation). æ™-, like ā-, derives generalizing pronouns and adverbs from interrogative ones: æ™hwæþer 'either', æ™hwilc 'every', æ™hwær 'anywhere'.
The prefix be- (cf. the adverb bi 'near’ and the preposition bi 'by') is added to substantives and verbs. Sometimes it preserves its original meaning 'around', sometimes its meaning is weakened. E. g.: be™ān 'go around', 'adore', behōn 'hang with’, besettan ‘besiege', bewēþan 'lament', beþencan 'think over', beniman 'deprive', behēafdian 'behead'.
The prefixfor- expresses destruction or loss: fordōn 'destroy', forweorþan 'perish'.
The prefix ™e - expresses either collectivity or perfection of an action: ™efēra 'fellow-traveller', ™efylc 'troop' (cf. folc 'people'), ™emynd 'mind', ™esēon 'see'.
The prefix mis- means negation or bad quality: mislīcian 'displease', misdæd 'misdeed'.
The prefixof- has a reinforcing meaning: ofslēan 'kill', oftēon 'take away'.
The prefixon- (corresponding to Germanent-, emp-, as in entlassen, empfangen) means change or separation: onbindan 'unbind', onlūcan 'unlock'. In some cases its meaning is weakened, as in onfōn 'accept', ondrædan 'dread'.
The prefixtō- expresses destruction: tōbrecan 'break', tōteran 'tear'.
The prefixun- has a negative meaning: uncuþ 'unknown'. Sometimes it means 'bad': undæd 'misdeed'. A productive prefix.
The prefixwan- also has a negative meaning: wanhāl 'unwell'.
COMPOSITION
Composition is widely used in OE. There are compound substantives, adjectives, and, in lesser number, verbs.
Sometimes the first component takes the form of the genitive case, as Mōnandæ™ (literally 'Moon's day') 'Monday', Tīwesdæ™ (literally 'Tiw's, the war god's, day') 'Tuesday', Wednesday 'Woden's day', 'Wednesday', þunresdæ™ (Thunor's, the god of thunder's, day) 'Thursday', Fri™edæ™ (Friya's day) 'Friday', Sæternesdæ™ ('Saturn's day') 'Saturday', Sunnandæ™ ('Sun's day') 'Sunday',