All know antonyms

verb know

• ignore — to refrain from noticing or recognizing: to ignore insulting remarks.
• misunderstand — to take (words, statements, etc.) in a wrong sense; understand wrongly.
• mix up — an act or instance of mixing.
• miss — to fail to hit or strike: to miss a target.
• neglect — to pay no attention or too little attention to; disregard or slight: The public neglected his genius for many years.
• overlook — to fail to notice, perceive, or consider: to overlook a misspelled word.
• confuse — If you confuse two things, you get them mixed up, so that you think one of them is the other one.
• misinterpret — Interpret (something or someone) wrongly.
• forget — to cease or fail to remember; be unable to recall: to forget someone's name.
• abstain — If you abstain from something, usually something you want to do, you deliberately do not do it.
• misknow — to fail to understand or recognize; misunderstand: to misknow the problem.