The affix liṅ (Benedictive) comes after a root, in expressing or making known of a wish, except when the word kaccit is in composition with it.,
The phrase कामप्रवेदना means the expression of one's wish. This debars all other tense-affixes. As कामो मे भुञ्जीत भवान् = अभिलाषो मे भुञ्जीत भवान् 'it is my wish that you will eat'.
Why do we say 'except the word कच्चित्'? Observe कच्चिज्जीवति ते माता कच्चिज्जीवति ते पिता । माराविद त्वां पृच्छामि कच्चिज्जीवति पार्वती ॥ 'I hope thy mother is living, I hope thy father is living, I ask thee, O maravid ! (Parrot), I hope that Parvati is living'.,