adjective
cruder; crudest
[also more ~; most ~]
very simple and basic :made or done in a way that does not show a lot of skill
rude in a way that makes people uncomfortable especially; :talking about sexual matters in a rude way
very simple and basic in a way that is true but not complete
noun
[noncount] :oil as it exists in the ground :petroleum that is not yet ready to be used as fuel - called also crude oil