English: perturbation
Welsh: aflonyddu a gwasgaru
Subject: Amaeth
English definition: Used in the context of badger vaccination, 'perturbation' refers to the disturbance of badgers with the possible consequence that they could disperse over a wider area carrying TB with them.
Welsh definition: O'i ddefnyddio yng nghyd-destun brechu moch daear mae'n cyfeirio at yr ofn a'r aflonyddwch a achosir i'r moch daear gyda'r posibilrwydd y gallent wasgaru ar hyd y fro a mynd â'r TB gyda nhw.