1
                obligation, duty, or burden
What is Onus/Onerous?
Very fancy
What is Outre?
to make intentionally confuse
What is Obfuscate?
historical, correct, sound
What is Orthodox?
Can be felt; plain, obvious, easily perceived
What is Palpable?
to go back and forth
What is Oscillate?
Stubborn
What is Obstinate?