What is an antonym for suffocate?

There isn't a single perfect antonym for "suffocate" because the word has multiple meanings and connotations. Here are some options depending on the context:

If referring to lack of oxygen:

* Breathe

* Ventilate

* Oxygenate

* Inhale

* Aerate

If referring to a feeling of being overwhelmed:

* Liberate

* Empower

* Free

* Unburden

* Relieve

If referring to a restrictive environment:

* Expand

* Open

* Liberate

* Emancipate

The best antonym will depend on the specific meaning and context of "suffocate" in your sentence.