What is the Latin word for inside?

The usual Latin words for “inside” are intus, intrā, interior. The right choice depends on the sense; see the distinctions below.

English → Latin

“inside” in Latin

intuson the inside: within, inside; from within, from the inside, out; to the inside: within intrāwithin; inside; during; less than interiorinner, interior; nearer; more secret, unknown

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

inside adv.

and preposition, intus (within; also after verbs of motion: quo simul atque intus est itum, Caes., B.C., 3, 36): intra (preposition within; e.g., intra muros): in (with, ablative “in”).

inside s.

pars interior: partes interiores: interiora, -um (plur. adjective). The inside of a house, pars interior sedium.

Quick answer

What is the Latin word for inside?: The usual Latin words for “inside” are intus, intrā, interior. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.