Most people know that the Biblical meaning of a word is determined by its underlying three-letter root. The Biblical root can be conjugated in different a) persons, b) tenses, c) pluralities, d) genders, e) constructions and f) modalities. For example I watched has a different conjugation then I will be watched even though both phrases will use the same 3 letter Hebrew root.

Rashi explains that the infinitive form can also indicate attribution. Hence Rashi translates Nu35-32b discussing the prohibition of bribes from residents of the refuge cities, as And you shall take no ransom for him who has fleed to his city of refuge, that he should come back to live in the land, until the death of the priest.

Advanced Rashi: We have followed our custom of embedding the Rashi comment in the body of the translation. Rashi also discusses the possibility of translating the Hebrew as the infinitive. In such a case the verse would read And you shall take no ransom to flee to his city of refuge, that he should come back to live in the land, until the death of the priest. Rashi rejects this as not making sense: Why should a person outside the refuge city need to bribe to come back to live in the land? For this reason Rashi interprets the infinitive form as indicating attribution. Rashi also brings several other examples.