D defs.my
Entry 1 sense Webster, 1913

Thereinto

· There·in·to · IPA /ðɛəɹɪnˈtuː/
01 adv. Into that or this, or into that place.
  1. 1.
    Into that or this, or into that place.
    “Let not them . . . enter thereinto.” — Luke xxi. 21.