Translation of frenar in Spanish-English

Only an independent observer would be able to judge nature, for example God. In this poem the independent power is the witch who cooks her soup of nature, she knows what ingredients she needs to add.
In addition, after the tests I would like to give also a presentation to some of the teachers, as usually the different ideas come with the presentation. After speaking with them, some ideas emerge...
She was a very cute twenty six year old woman from the area, had a perfect English and could be understood well. She told us to put on good shoes and we started walking towards the valley.