Related Clues:

• Unpleasant looking
• Unpleasant and somewhat smug lyricist
• Like Christmas sweaters, to many
• 'Things might get ___ . . .'
• Repulsive looking
• 'The ___ Cry' (Danielle Henderson memoir)
• Pretty ___ (oxymoron)
• "The ___ Duckling" (fairy tale)
• It's not nice starting university with key to empty place
• Unblocking lavatory - when emptied it ain't pretty
• Turn ___ (become unpleasant)
• Threatening, disquieting
• __ Betty, US comedy-drama series
• Disheartened lurgy turned nasty
• Lastly, you mentioning occupational injury is threatening