czasem

• Adv

  1. every now and then, from time to time, occasionally, sometimes
  2. sometimes (in one or another case against the background of many others)

• Particle
• Noun

trzeba

1. expresses the goodness of the following verb; it is needed, one ought to [+infinitive]
2. expresses the naturalness or obviousness of the following verb; ought to, must [+infinitive]
3. expresses the necessity or obligation of the following verb; it is needed, one ought to [+infinitive], [+dative = for whom], [+genitive = what is needed]

wiedzieć

1. to know (to perceive the truth or factuality of; to be certain of or that) [+ o (locative) = about something] [+ po (locative) = from what]
2. to know [+ o (locative) = about something] (to be aware of; to be cognizant of)
3. to know (to have knowledge; to have information, be informed)
4. to know (to understand or have a grasp of through experience or study)

kiedy

• Pron

  introduces either a dependent or interrogative clause in reference to time; when

• Conj
• Adv

się

• Pron

  1. reflexive pronoun; oneself, self
  2. each other, one another
  3. one's own home

• Particle

przebranżowić

1. to change the sector of operation (of an enterprise)
2. to rebrand oneself, to retrain (to change one's career field)