Word: triathlons
Part of speech: Noun
Syllables: tri
ath
lons
Definition: Plural of triathlon. A former Olympic athletics event in which contestants compete in long jump, shot put, and 100-yard dash.
Morphemes:
Affix: tri-
Language: en
PoS: Prefix
Meaning: three
Etymology Compounds: Affix: tri-
Language: la
Decoded: tri-
Meaning: three
Affix: -athlon
Language: en
PoS: Suffix
Meaning: Contest
Etymology Compounds: Affix: h₂weh₁-
Language: ine-pro
Decoded: h2weh1-
Meaning: to blow 
Affix: -dʰlom
Language: ine-pro
Decoded: -dhlom
Meaning: forms nouns denoting tool or instrument
Affix: -s
Language: en
PoS: Suffix
Meaning: Used to form regular plurals of nouns.