forbidden ground

Area declared restricted

Forbidden ground is territory—physical or metaphorical—where entry or discussion is prohibited or strongly discouraged.

The phrase often describes topics too sensitive, painful, or taboo to broach: His time in prison was forbidden ground at family gatherings.

It can also refer to actual places one must not enter, whether for legal, safety, or sacred reasons.

The related phrase tread on forbidden ground means to venture into such dangerous territory.

Opposites
accessibility/permission

forbidden groundopen access

Free public scholarly content

public land · common ground · free zone · public domain · fair game

topic/discourse permission

forbidden groundfair game

Legitimate object of pursuit

common parlance · polite conversation

Family

forbid, forbade, forbids, forbidding, forbidden, forbiddance, ground, grounds, grounded

Familiarity
Top 200,000
Profile
Known to kids · Used worldwide · Timeless · Negative · Everyday, not technical · Rated G