1. Not admitting an additive or multiplicative inverse

Antonym: invertible

• false sago
• false sarsaparilla
• false scorpion
• false smut
• false start
• false tamarisk
• false teeth
• false topaz
• false truffle
• false vampire
• false vampire bat
• false verdict
• false vocal cord
• false vocal fold
• false wintergreen
• false witness
• falsehood
• falsely
• falseness
• falsetto
• falsie
• falsifiable
• falsification
• falsifier
• falsify