Castile

[ ka-steel ]
/ kæˈstil /

noun

Spanish Cas·ti·lla [kahs-tee-lyah, -yah] /kɑsˈti lyɑ, -yɑ/. a former kingdom comprising most of Spain.
Also called Castile soap. a variety of mild soap, made from olive oil and sodium hydroxide.
any hard soap made from fats and oils, often partly from olive oil.

British Dictionary definitions for castile soap (1 of 2)

Castile soap

noun

a hard soap made from olive oil and sodium hydroxide

British Dictionary definitions for castile soap (2 of 2)

Castile

Castilla (Spanish kasˈtiʎa)

/ (kæˈstiːl) /

noun

a former kingdom comprising most of modern Spain: originally part of León, it became an independent kingdom in the 10th century and united with Aragon (1469), the first step in the formation of the Spanish state