Auld Lang Syne. Here're my thoughts on the origin of the phrase... Auld: The scottish form or old. It contains the 'base' of 'Au' signifying truth. E.g. Gold, Lt. aurum. Chemical symbol: Au. Ear drum, Auricle. True sound?
Syne: union, uniting. E.g. synthesis, synchronize.
Putting it all together. True yearning for being with true friends. These are my thoughts on the origin of the new year's phrase.