Detergent plant

• Detergent root
• Root used as a substitute for soap
• "...mountain out of --- hill"
• Whack-___
• Root used as a soap substitute
• Soap substitute
• Soap source
• Plant with detergent properties
• Plant used as a cleanser

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1831, from Mexican Spanish amole , from Nahuatl (Aztecan) amolli "soap-root."