duff² /duf/ (informal)

1. No good
2. Broken, not working

• strong point
• strongpoint
• strong points
• strongpoints
• strongroom
• strongrooms
• strong suit
• strong wheat
• strongyl
• strongyle
• strongyles
• strongyloid
• strongyloidiasis
• strongyloses
• strongylosis
• strongyls
• strontia
• strontian
• strontianite
• strontianites
• strontians
• strontias
• strontium
• strontium-90
• strontiums