dat

• Det

  that (neuter); referring to a thing or a person further away.

• Pron
• Conj

was

• Noun

  laundry, clothes that need to be washed, or just have been washed.

• Verb
• Verb

op zich

in itself, per se

een

• Article

  Placed before a singular noun, indicating a general case of a person or thing: a, an. Compare with de and het.

• Num

hele

• Adv

  Alternative form of heel

• Adj
• Verb

uitdaging

1. challenge (something challenging)
2. challenge (act of challenging someone)

op

• Adv

  1. up
  2. onto, up onto
  3. Used in separative verbs meaning “to go away” with rude connotations.

• Prep
• Adj

zich

1. Third person singular and plural reflexive pronoun; himself, herself, itself, themselves, oneself
2. Second person singular and plural formal reflexive pronoun; yourself, yourselves
3. expresses an unintended result with many otherwise non-reflexive and ergative verbs