1) паразитный 2) посторонний 3) чуждый
прилагательное внешний, поступающий извне; посторонний, чуждый Например: These questions are extraneous to the problem being discussed. — Эти вопросы не связаны с обсуждающейся проблемой. Синоним(ы): immaterial, inessential, irrelevant, superfluous, extrinsic Антоним(ы): essential, intrinsic, material, relevant, significant
adjective Etymology: Latin extraneus — more at strange 1. existing on or coming from the outside Example: extraneous light 2. a. not forming an essential or vital part Example: extraneous ornamentation b. having no relevance Example: an extraneous digression 3. being a number obtained in solving an equation that is not a solution of the equation Example: extraneous roots Synonyms: see extrinsic • extraneously adverb • extraneousness noun