In-between in a sentence as an adjective

I don't advise them to "trust" their ISP, the outside contractors' network, and all the other businesses in-between.

Because Curl has this weird in-between setting, which does not express any security policy I can figure out, they're effectively not verifying certificates.

In-between definitions

adjective

being neither at the beginning nor at the end in a series; "adolescence is an awkward in-between age"; "in a mediate position"; "the middle point on a line"

See also: mediate middle