Go Ahead and Sue Me--but you wouldn't win

Words and phrases with which I've recently been reacquainted--and that I've found that I'd missed (in no particular order):

• sua sponte
• mitigate
• arguendo
• res ipsa loquitur
• loss of consortium
• putative
• collateral estoppel
• subsequent remedial measures
• RICO
• constructive easement
• implied warranty of habitability
• sine qua non

(OK, sine qua non is my favorite.)

In a few days (say, Friday?), I'll post the definitions. For now, would anyone care to hazard a guess as to what any of them mean, without first having looked them up?