Synonym: fruitless, ineffectual, worthless. Antonym: useful. Similar words: senseless, careless, nonetheless, homeless, hopeless, tasteless, guileless, changeless. Meaning: ['juːslɪs] 
adj. having no beneficial use or incapable of functioning usefully.
adj. having no beneficial use or incapable of functioning usefully. 151. It is useless for me to point out that scientific curiosity by itself is as irresponsible as the curiosity of a child.
More similar words: senseless, careless, nonetheless, homeless, hopeless, tasteless, guileless, changeless, nevertheless, tactlessness, select, selected, selection, vessel, less, telescope, celestial, bless, unless, lesson, endless, witless, odorless, pitiless, much less, less than, flawless, tactless, harmless, reckless.