Based on corpus data, this paper investigates the distribution of two closely related Polish constructions, viz. daleki od 'far.ADJ from' X and daleko od 'far.ADV from' X. It is shown that only the former exhibits regular extended uses involving a variety of complement types, while the latter is largely confined to spatial marking. The advanced host-class expansion of the daleki od 'far.ADJ from' X-construction is argued to reflect an ongoing, metaphorically driven process of grammaticalization.