Word formation in English involves processes like...

Compound words in English, such as "blackbird" or "greenhouse", are commonly restricted to a single orthographic form in formal academic registers.

Derivational suffixes like "-en", when added to adjectives such as "short" or "weak", function as verb-forming markers that indicate the process of making or becoming something.

In English morphology, the addition of a derivational suffix typically does not alter the grammatical category of the base word, affecting mainly its semantic nuance.

The prefix "un-" is predominantly used with verbs to indicate a reverse action, while the prefix "in-" and its allomorphs (im-, il-, ir-) are generally used with adjectives.