Displeasing to the eye.

not desiring the company of others / not congenial or compatible / unfriendly

A person who is not sociable.

(transitive) To reverse the process of scrambling, decrypt. / (transitive) To put into order or restore to order.

Not savory; without flavor. / Of bad taste; distasteful. / Making an activity undesirable. / Disreputable, not respectable, of questionable moral character.

Not safe (various senses); dangerous.

(transitive) To remove the safety from (a weapon).

Disturbed, upset. / Not in a steady condition, uncertain, subject to change. / Not populated, having no settlers or other inhabitants. / Unpaid.

simple past tense and past participle of unsettle

Not sanitary; unhealthy; dirty.