Artificial intelligent assistant

imperceptibly

imperceptibly, adv.
  (ɪmpəˈsɛptɪblɪ)
  [f. imperceptible + -ly2.]
  In an imperceptible manner or degree; so as not to be perceived.

1603 Florio Montaigne (1634) 117 So doth our minde cast her points diversly and imperceptibly. 1734 Berkeley Visitat. Charge Wks. 1871 IV. 653 Discourse..that imperceptibly glides from one subject to another. 1824 L. Murray Eng. Gram. (ed. 5) I. 213 The proposed variations..are introduced and established almost imperceptibly. 1875 Jowett Plato (ed. 2) IV. 276 The powers of sense and of reflection..pass imperceptibly into one another.

Oxford English Dictionary

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