Athematic verb

An athematic verb is one that is formed without a thematic or connecting vowel. It is also referred as a μι verb because this type of verb has a lexical form ending with μι. These verbs have a peculiar conjugation pattern which is called, obviously, an athematic or a μι conjugation.

Such verbs have the following features:
 * There changes to the present tense stem can be so drastic as to be unrecognisable. One group of them undergo reduplication.
 * However such changes usually affect only the present tense stem.
 * There are only a small number of these verbs but they occur frequently.
 * Remembering the root is the key to recognising the various principal parts of these verbs.
 * Mounce classifies these athematic verbs into two groups:
 * v-6a - verbs which reduplicate in forming the present tense stem
 * v-6b - verbs which do not reduplicate

Examples of μι verbs which exhibit reduplication

 * δίδωμι, root δο

Examples of μι verbs which do not exhibit reduplication

 * δύναμαι
 * εἰμί