Browbeat is a negative word.

The teacher browbeat her students into completing their assignments.

In any sport it is rude to browbeat other players.

The past participle is browbeaten.

The simple past tense is browbeat.

A positive browbeat connotation does not typically exist, as "browbeat" conveys a negative meaning of intimidating or pressuring someone. If someone uses "browbeat" in a positive context, it is likely an attempt to emphasize assertive or strong behavior, but it may still come across as forceful or aggressive.