keenly russian

• жи́во

  vividly, strikingly, keenly, with animation, quick, promptly

• о́стро

  sharply, sharp, keenly

• чу́тко

  keenly, tactfully

• пытли́во

  inquisitively, curiously, searchingly, keenly

• проницательно

  perceptively, keenly, shrewdly, sagaciously