The affixes liṅ (Benedictive) and loṭ (Imperative) come after a verb by which 'benediction' is intended.,
The word आशीस् means the wish to obtain an object which one desires, a blessing, an expression of one's good wishes. The लिङ् here referred to is what is known as the आशीर्लिङ् or the Benedictive tense. Its conjugation is different from the conjugation of the ordinary लिङ् which we have called the Potential or Optative; as चिरं जीव्याद् भवान् or चिरं जीवतु भवान् 'may you live long'!
Why do we say 'when denoting benediction'. Observe चिरं जीवति देवदत्तः 'Devadatta lives long'.,