seit

• Conj

  since

• Prep

seiner

• Pron

  his (substantival possessive)

• Det

Jugend

1. youth (quality or state of being young; part of life following childhood)
2. youth (young people collectively)

befasste

1. inflection of befassen:
2. inflection of befassen:

er

1. he.
2. it (when the grammatical gender of the object/article/thing/animal etc., being referred to, is masculine (der)).
3. she (when the grammatical gender of the noun being referred to and designating a female person, is masculine (der)).
4. Alternative spelling of Er (you (polite))

mit

• Prep

  1. with (in the company of; alongside)
  2. with, by (using as an instrument; by means of)
  3. with (as an accessory to)
  4. with (having)
  5. at (with the age of)
  6. with, including, with ... included

• Adv

Ringen

gerund of ringen; (olympic) wrestling

Boxen

boxing