Adapted borrowing of Latin subtīlis + -ny. Earlier, as expected, subtylny.[1] The current form is hypercorrect – when the accepted pronunciation of é was changing from y to e, the word was reinterpreted as subtélny, and the new y-less form was reinforced by adjectives in -telny.
subtelny (comparative subtelniejszy, superlative najsubtelniejszy, derived adverb subtelnie)
| singular | plural | |||||
|---|---|---|---|---|---|---|
| masculine animate | masculine inanimate | feminine | neuter | virile (= masculine personal) | non-virile | |
| nominative | subtelny | subtelna | subtelne | subtelni | subtelne | |
| genitive | subtelnego | subtelnej | subtelnego | subtelnych | ||
| dative | subtelnemu | subtelnej | subtelnemu | subtelnym | ||
| accusative | subtelnego | subtelny | subtelną | subtelne | subtelnych | subtelne |
| instrumental | subtelnym | subtelną | subtelnym | subtelnymi | ||
| locative | subtelnym | subtelnej | subtelnym | subtelnych | ||