Words that have the root 'scribe' are: ascribe circumscribe describe inscribe prescribe proscribe subscribe superscribe transcribe
Regulations contains the root word regulation. As does deregulation.
scepter?
Obfuscate, obstetrician, observatory, oblate.
I haven't come across this word but, if it does indeed exist, it will derive from the Greek 'lethe' (forgetfulness) and 'argos' (idle), as does the word 'lethargy'.