jego

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

przecież

used to introduce a new, conflicting fact, but; after all

trzeba

1. expresses the goodness of the following verb; it is needed, one ought to
2. expresses the naturalness or obviousness of the following verb; ought to, must
3. expresses the necessity or obligation of the following verb; it is needed, one ought to

załatwić

1. to take care of, to deal with, to get done
2. to arrange, to set up for someone
3. (colloquial) to take care of, to deal with, to kill
4. (colloquial) to do one's business, to defecate, to urinate