હ(h) is a consonant which is not generally added with other consonants. I mean, there are very few words in which હ(h) is first consonant and so to be pronounced half.
We can denote half sound of હ(h) by standard way of giving slanting line below હ(h) i.e. હ્‍
But there are few peculiar ways in which such combined sound is written traditionally
હ(h) + ય (y) = હ્ય (hy)
હ(h) + મ (m) = હ્મ(hm)
હ(h) + ન (n) = હ્ન(hn)
હ(h) + ણ (N) = હ્ણ(hN)
હ(h) + ર (r) = હ્ર(hr)
e.g.
support -> સાહ્ય( sAhy )
external -> બાહ્ય(bAhy)
Brahman -> બ્રાહ્મણ ( brAhmaN )
A ritual  -> આહ્નિક(Ahnik )