Oservant is likely misspelled.
Oservant has no English definition.
As an adjective watchful is
observant, vigilant and aware.
oservant
Not English
Oservant has no English definition. It may be misspelled. watchful
English
Adjective
(
en adjective)
observant, vigilant and aware
* Sysops keep a watchful eye on wiki edits.