Grandpa Bangulzai hath come to clarify the doubt~~~ 
I didn't know rain as in "ujan" is written is "hujan"...
>_<
and when Hokkien and Teochew adopted the Malay loanwords, the
"h" was already lost too
like Malay "hukum" (law) --> pronounce "ukum" -->
import into Hok/Teo "or-kong" (fine)
like Malay "hutan" (forest) --> pronounce "utan" -->
import into Teo "ou-tang" (forest)