bisigh1, v.t. & i. (vn. -iú m, gs. -ithe). 1. Improve. Bheith ag bisiú, to be on the mend. Bhisigh sé ina shláinte, ina ghné, he improved in health, in appearance. Bhisigh an saol ó shin, times have improved since then. Tá an aimsir ag bisiú, the weather is improving. 2. Increase, prosper. Tá sé ag bisiú sa saol, ina ghnóthaí, he is getting on well in the world, in his business. Beannú ar an leanbh, is é atá ag bisiú, the child is thriving well, bless him. Go mbisí Dia sibh, may God prosper you.