permanent   
antitra
mature, ripe, aged, old, permanent, durable, gone through with, completed, perfected; deep as applied to colours; old in the sense of used up, or worn out, as a pen, a coat, etc. [Richardson 1885]

permanent   
maharitra
permanent, durable [SLP: Voambolana]
mandavantaona
qui dure toute l'année, qui sévit toute l'année, permanent [SLP: Voambolana]