Word: octathlons
Part of speech: Noun
Syllables: oc
tath
lons
Definition: Plural of octathlon; a combined event competition consisting of eight different sports or contests
Morphemes:
Affix: octa-
Language: en
PoS: Prefix
Meaning: eight
Etymology Compounds: Affix: ὀκτά-
Language: grc
Decoded: okta-
Meaning: eight
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.