Synonyms for Give the high sign:

• v.

  •alert (verb)
  • tip off,
  • put on guard.
  •caution (verb)
  • admonish,
  • alert,
  • exhort,
  • wise one up,
  • pull one's coat,
  • give the lowdown on,
  • wave a red flag,
  • put one wise,
  • urge.
  •gesture (verb)
  • signalize.
  •signalize (verb)
  • use one's hands,
  • indicate,
  • pantomime,
  • wave,
  • sign,
  • act out,
  • mime,
  • use sign language.
  •warn (verb)
  • direct,
  • reprove,
  • cry wolf,
  • remonstrate,
  • enjoin,
  • prompt,
  • prepare,
  • instruct,
  • remind,
  • prescribe,
  • recommend,
  • acquaint,
  • tell,
  • guide,
  • fill in,
  • clue,
  • summon,
  • order,
  • lay it out,
  • suggest,
  • forearm,
  • give warning,
  • wise up,
  • threaten,
  • counsel,
  • make aware,
  • predict,
  • post,
  • address,
  • clue in,
  • deprecate,
  • forbid,
  • advocate,
  • hint,
  • caution.

• Other synonyms:

  •
  • gesticulate.
  •
  • gesture.
  •
  • motion.
  •caution
  • wised up.
  •forewarn
  • warn.
  •signalize
  • pantomimes,
  • pantomimed,
  • pantomiming.
  •warn
  • forearming,
  • forearmed,
  • made aware,
  • clued in.

Antonyms for Give the high sign:

• v.

  • alert
    conceal, hide.
  • warn
    compliment, disorganize, mislead, misguide, praise, laud, approve, neglect, allow, withhold, prevent, commend, permit, ignore, discourage, dissuade.