wtedy

1. back then, then (at that time)
2. at the time

się

• Pron

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

• Particle

on

he (for animate nouns), it (for inanimate nouns)

do

1. denotes allative movement; to, toward
2. denotes illative movement; into, in
3. denotes purpose; for, to
4. denotes the subject of an address or action; to
5. until, till, to
6. up to, as many as
7. denotes a deadline; by (indicates an intended deadline)

uderzenia

1. genitive singular of uderzenie
2. nominative plural of uderzenie
3. accusative plural of uderzenie
4. vocative plural of uderzenie

to

• Conj

  1. used to attribute to the known object a characteristic that helps one know more about the topic; may optionally be followed by jest
  2. used to juxtapose elements that are equivalent
  3. used to indicate that the subject of the conversation has peculiarities which are familiar to the interlocutors, so that nothing else needs to be said about it in order to understand the topic
  4. in that case, then (used in if-constructions)

• Particle
• Pron

jego

1. his: possessive pronoun of on
2. its: possessive pronoun of ono

uderzenie

1. verbal noun of uderzyć
2. blow, hit, punch
3. lash