Word: rider
Part of speech: Noun
Syllables: rid
er
Definition: Someone who rides a horse or (later) a bicycle, motorcycle etc.
Morphemes:
Affix: ride
Language: en
PoS: Noun
Meaning: An instance of riding.
Affix: -er
Language: en
Meaning: agent noun
Etymology Compounds: Affix: -ārius
Language: la
Decoded: -arius
PoS: Suffix
Meaning: -er; Used to form nouns denoting an agent of use, such as a dealer or artisan, from other nouns.