Can 'in-' mean both 'in' and 'no'?

1. What does in and in mean?
2. What is the preposition use of in?

What does in and in mean?

adverb or adjective

ˌin-ən(d)-ˈin. : in repeated generations of the same or closely related stock. families … of one blood through mating or marrying in-and-in F. H. Giddings.

What is the preposition use of in?

To refer to a place, use the prepositions "in" (the point itself), "at" (the general vicinity), "on" (the surface), and "inside" (something contained). They will meet in the lunchroom.