老底

sb.'s past

老的英语翻译：

aged; always; old; outdated; tough; very
【医】 palae-; paleo-; presby-

底的英语翻译：

a copy kept as a record; base; bottom; end; fundus; the truth of a matter
【医】 base; basement; bases; basi-; basio-; basis; batho-; bathy-; fimdi
floor; fundus; pavimentum; solum