A noun suffix, commonly having a diminutive or a depreciatory force; as in duckling, gosling, hireling, fosterling, firstling, underling. [1913 Webster]
-ling,
An adverbial suffix; as, darkling, flatling. [1913 Webster]
-ling, suffix.
1 denoting a person or thing: a connected with (hireling; sapling). b having the property of being (weakling; underling) or undergoing (starveling).
2 denoting a diminutive (duckling), often derogatory (lordling).
-ling, suffix forming adverbs and adjectives (darkling; grovelling) (cf. -LONG).