Ключевые слова: alcohol, aseptic, background, block, clean, concept, condition, contamination, dirt, disinfect, disinfectant, easy, environment, free, fresh, good, health, healthcare, healthy, home, household, housework, hygiene, hygienic, impurity, innocent, janitor, letter, polish, prevention, procedure, process, protection, pure, purified, sanitary, sanitize, sanitizer, save, stain, sterile, surface, wash, wood, word,