Word: fartleks
Part of speech: Noun
Syllables: far
tleks
Definition: Plural of fartlek; a method of athletic training (especially for runners) in which strenuous effort and normal effort alternate in a continuous exercise
Morphemes:
Affix: fartlek
Language: en
PoS: Noun
Meaning: An athletic training technique, used especially in running, in which periods of intense effort alternate with periods of less strenuous effort in a continuous workout.
Etymology Compounds: Affix: fart
Language: sv
Decoded: fart
Meaning: speed
Affix: lek
Language: sv
Decoded: lek
Meaning:  play
Affix: -s
Language: en
PoS: Suffix
Meaning: Used to form many pluralia tantum (nouns that are almost or entirely without singular forms).