What is the prefix of law?

There isn't a single specific prefix that is universally used for "law". However, there are several prefixes used in words related to law, depending on the specific meaning you want to convey. Here are a few examples:

For legal concepts:

* Leg-: This is the most common prefix for words related to the law, deriving from the Latin word "lex" meaning "law". Examples include legal, legitimate, legislative, legislator, legislation, etc.

* Juri-: This prefix also comes from Latin, specifically "juris", meaning "law" or "right". Examples include jurisprudence, jurisdiction, juridical, jury, etc.

For other related concepts:

* Stat-: This prefix comes from the Latin "statutum" meaning "that which has been set up" or "established". It's often used for words related to laws enacted by a government, such as statute, statutory, statute book, etc.

* Nom-: This prefix comes from the Greek "nomos" meaning "law", "custom", or "rule". It's found in words like nomology, nomography, nomination, etc.

Therefore, there is no single prefix for "law". The best prefix to use depends on the specific meaning and context you want to convey.