I love this shirt! But I don't think I can afford it; it is very costly.
I want to purchase a new car. (verb)Your purchase is costly. (noun)
Upscale Apex
Amanda decided not to buy the costly sweater, but instead a cheap belt.
Kimti.
No, it is not (despite the LY ending). The word costly is an adjective (expensive, high-priced).
Lavish or costly.
Expensive ...
intact
costly
Rotten
These border disputes become more costly each day.
The Somme bombardment was brutal and costly but highly ineffective.