at one's own peril

: belonging to oneself or itself

used to express immediate or direct kinship

: to have or hold as property : possess

: to have power or mastery over

: to acknowledge to be true, valid, or as claimed : admit

: one or ones belonging to oneself

: exposure to the risk of being injured, destroyed, or lost : danger

: something that imperils or endangers : risk

: to expose to danger