The Word is:”know”

know

/nəʊ/

verb

verb: know; 3rd person present: knows; past tense: knew; gerund or present participle: knowing; past participle: known
1.be aware of through observation, inquiry, or information.

“most people know that CFCs can damage the ozone layer”
synonyms: be aware, realize, be conscious, have knowledge, be informed, have information; More

  • have knowledge or information concerning.
    “I would write to him if I knew his address”
    synonyms: have knowledge of, be aware of, be cognizant of, be informed of, be apprised of
    “I would write to him if I knew his address”
  • be absolutely certain or sure about something.
    “I just knew it was something I wanted to do”
  • 2.have developed a relationship with (someone) through meeting and spending time with them; be familiar or friendly with.

    “he knew and respected Laura”
    synonyms: be acquainted with, have met, be familiar with; More

  • have a good command of (a subject or language).
    synonyms: be familiar with, be conversant with, be acquainted with, have knowledge of, be versed in, be knowledgeable about, have mastered, have a grasp of, grasp, understand, comprehend, apprehend; More
  • recognize (someone or something).
    “Isabel couldn’t hear the words clearly but she knew the voice”
  • be familiar or acquainted with (something).
    “a little restaurant she knew near Leicester Square”
  • have personal experience of (an emotion or situation).
    “a man who had known better times”
    synonyms: experience, have experience of, go through, undergo, live through, meet, meet with, encounter, taste
    “a man who had known better times”
  • regard or perceive as having a specified characteristic.
    “the loch is known as a dangerous area for swimming”
  • give (someone or something) a particular name or title.
    “the doctor was universally known as ‘Hubert’”
  • be able to distinguish one person or thing from (another).
    “you are convinced you know your own baby from any other in the world”
    synonyms: distinguish, tell apart, differentiate, tell, tell which is which, discriminate; More

  • 3.archaic

    have sexual intercourse with (someone).

    Source credit: Google