sothat   
ka
that, so that, and so; but, therefore. It is often followed by "dia". In the provinces, it is often "ko": Nantsoiny ka tonga aho (Called by him, and so I am come) ~ Nanantena anao ho tonga aho, ka tsy tonga hianao (I hoped you woud come, but you did not come ~ Nokapohinao ka kaody izy (Flogged by you, and therefore he is shy) [Richardson 1885]