forbidding

Appearing to be threatening, unfriendly or potentially unpleasant.

• What cause, cry’d he, can justify our flight, To tempt the dangers of forbidding night?
• As we breasted the first summit, the precipitous mass of the Raven's Rock, towering some 250 ft. above the railway, looked grim and forbidding in the failing light, and distant Ben Wyves was shrouded in mist.

present participle and gerund of forbidform-ofgerundparticiple

The act by which something is forbidden; a prohibition.

• 1920, St. John G. Ervine, The Foolish Lovers, London: W. Collins & Sons, Chapter 3, VIII, p. 228, All law was composed of hindrances and obstacles and forbiddings, and therefore he was entirely opposed to Law.