Piling is a type of ground treatment which is driving a pile into the ground below ground level. Except sheet pile, other piles like concrete pile, timber pile, steel pile, bored pile are used to transfer the building load to the ground.
Definition of repeal. 1  transitive verb. 2  1 : to rescind or annul by authoritative act; especially : to revoke or abrogate by legislative enactment. 3  2 : abandon, renounce. 4  3 obsolete : to summon to return : recall.
You repeal it, of course, so abrogate means to officially revoke, cancel or abolish. The meaning of this word has expanded a bit since its earliest usage, but it still appears most often in a legal or political context, or when serious rights and responsibilities are being discussed.