verb TRANSITIVEthe staff is undergoing trainingtá oiliúint á cur ar an bhfoireann, tá an fhoireann ag dul faoi oiliúintthe new fan is undergoing testingtá tástáil á déanamh ar an bhfean nuaI underwent surgerychuaigh mé faoi scianthe city has undergone a huge expansiontá méadú as cuimse tagtha ar an gcathairto undergo painpian a fhulaingt