Search and compare thousands of words and phrases in British Sign Language (BSL). The largest collection online.
How to sign: a dark oil consisting mainly of hydrocarbons
Within this category: residual oil
How to sign: belonging to an early stage of technical development; characterized by simplicity and (often) crudeness
"the crude weapons and rude agricultural implements of early man"; "primitive movies of the 1890s"; "primitive living conditions in the Appalachian mo;