Inadvertent
[adjective]
MEANING:
1. heedless, careless or not intentional
Inter
[transitive verb]
MEANING:
1. entomb or bury
Minatory
[adjective]
MEANING:
1. threatening, alarming or ominous
Obstinate
[adjective]
MEANING:
1. stubborn, unyielding or mulish
2. difficult to treat or alleviate
3. persistent or refractory
Peremptory
[adjective]
MEANING:
1. that cannot be challenged, refused or changed
2. dictatorial or imperative
3. (law) one that cannot be questioned, changed or denied
4. assertive in behaviour
5. urgent or commanding in nature