English: contaminated land
Welsh: tir halogedig
Subject: Amgylchedd
English definition: land which has been polluted or harmed in some way rendering it unfit for safe development and most practical uses
Welsh definition: tir a gafodd ei halogi neu ei niweidio mewn rhyw ffordd a'i gwnaiff yn anaddas ar gyfer datblygiad diogel a'r rhan fwyaf o ddefnyddiau ymarferol