inter pocula (L.), over one's cups.
in terrorem (L.), as a warning.
inter se (L.), amongst themselves.
in toto (L.), in the whole: entirely.
intra muros (L.), within the walls.
in transitu (L.), on the passage.
in usum Delphini (L.), for the use of the Dauphin: toned down to suit the young person.
in utrumque paratus (L.), prepared for either alternative.
invenit (L.), [T.D.] devised [this].
in vino veritas (L.), in wine the truth [comes out].