What is the technical meaning of dig in this sentence? I have to dig by the cypress tree to find the buried treasure

thats where the treasure is and you need  shovel to dig it up? ;-;

Explanation:

tom comes from a southern part of the hemisphere and down in the south they talk with a lot of slang the family doesnt quiet understand what tom is tryna say becaus ehe talks like a three year old but near the end they finally try and desihper toms letter and its a success i have no idea hwta book this is or how to even answere this question honeslty but i am a really fast typer so i did this actually incrediably quick with the swiftness of the flash