Ключевые слова: active, adequate, advantageous, beneficial, capable, cogent, coherent, compelling, competent, conclusive, constructive, convincing, decisive, determinative, effectual, efficacious, efficient, eloquent, forceful, forcible, functional, impactful, influential, of assistance, of help, of use, operative, persuasive, pertinent, potent, powerful, practical, productive, requisite, serviceable, striking, successful, sufficient, suitable, telling, valid, valuable, workable, worthwhile,