teastaigh1, v.i. (vn. -táil).1. Be wanted, needed (ó, by). Teastaíonn cabhair uaim, I need assistance. An dteastaíonn uait labhairt leis? Do you want to speak to him? Teastaíonn foighne chun na hoibre sin, that work requires patience. Tá sé ag teastáil go mór uaim, I need it badly. Sin a bhfuil ag teastáil, that is all that is necessary. 2. Lit: Die, be lost (ó, to). Theastaigh sochaí mhór díobh, a great number of them perished. An méid de na Fianna a theastaigh uainn, those of the Fianna who were lost to us. (Var:pres. & p. teasta)