Sotho deficient verbs

In the Sotho language, the deficient verbs are a special subset of Sesotho verbs that require a subordinate or complementary verb to complete their action, and which are used to form many tenses and to impart certain shades of meaning to the predicate. These verbs form part of multi-verbal conjugations comprising a string of verbs (each with its own subjectival concord) and verbal auxiliaries.

Deficient verbs, being "deficient", are never used alone. Many of them are irregular in form and have irregular inflexions. Many of these verbs seem radical in nature, while others (especially those with complex implications) are obviously derived from certain extant normal verbs (but are used with slightly different meanings). What distinguishes the deficient usage of these normal verbs is the fact that they are followed by another verb and affect its meaning (and only the main verb may carry an objectival concord).