peace wakas, all
&mr = to live, life, to revive, to make better, to build, to live long, to develop, to remain alive (save life), to serve!!, to uphold.
kfr= to conceal, to cover (seems very similar to the arabic pronunciation!), to reject, black horse, dark night, farmer, ...
i do not know what to do with derivatives of the same word? like 'kaf farah', kafoor, and etc.
Peace