soap tree

9.3

A tall desert plant like a yucca with long stringy leaves and a large flower cluster

noun
/soʊp tri/

: árbol de jabón

A cluster of creamy white flowers blooms atop the soap tree each spring.

Examples

Native peoples traditionally used parts of the soap tree for making soap and fiber.
The soap tree is well adapted to arid environments in the American Southwest.
The soap tree is a unique plant.
Many soap trees grow in Arizona.
A cluster of creamy white flowers blooms atop the soap tree each spring.
The soap tree is well adapted to arid environments in the American Southwest.
Native peoples traditionally used parts of the soap tree for making soap and fiber.

Synonyms

soapweed

vssoap tree

1 9.9

A tall plant like a yucca with long, sword-shaped leaves and clusters of white flowers

highlights fibrous leaf texture rather than especially tough leaves

soap-weed

vssoap tree

9.9

A tall plant like a small tree with long pointed leaves and white flowers

emphasizes fibrous leaves rather than sword-shaped ones

Yucca elata

vssoap tree

Specialized

9.6

A tall tree-like desert plant with a thin trunk and clusters of white flowers

focuses on fibrous leaves and a large flower cluster rather than trunk features

Surface Forms

soap tree singular

soap trees plural

Morphology

soap + tree

This is a clear noun+noun compound where the modifier 'soap' specifies the kind or use of the noun 'tree' (i.e. a tree associated with soap or used for soap-making). The compositional pattern is straightforward and cross-linguistically common, so a B1 learner who knows 'soap' and 'tree' can infer the general meaning even if they lack the botanical specifics.

Etymology

The name soap tree comes from how people used the plant: they mashed its roots and leaves to make a soapy liquid like soap. So the words soap and tree together mean a tree used for 'cleaning'.