thorough

adjectives

painstakingly careful and accurate
"our accountant is thorough"; "thorough research"
is derived from
is similar to
exercising caution or showing care or attention
"they were careful when crossing the busy street"; "be careful to keep her shoes clean"; "did very careful research"; "careful art restorers"; "careful of the rights of others"; "careful about one's behavior"
performed comprehensively and completely
"an exhaustive study"; "made a thorough search"; "thoroughgoing research"
is derived from