HackerVoca

objective : unprejudiced, unbiased, impartial, fair
obligation : requirement, duty, responsibility
oblige : require, compel, force, coerce verb [transitive]
to force someone to do something they do not want to do by threatening them : coerce sb into doing sth: The rebels coerced the villagers into hiding them from the army.
obscure1 adjective

1 not at all well known and usually not very important: an obscure poet | The exact origin of the paisley design is obscure.

2 difficult to understand: obscure legal phrases

obscurely adverb
: unclear, uncertain, ambiguous, indistinct, blur1 / noun [singular]

1 [countable] a shape that you cannot see clearly: Everything's a blur without my glasses. | the blur of headlights in the distance

2 an unclear memory of something: The events of that day gradually became a blur in her mind.

observance : fulfilling / adjective
a job, relationship etc that is fulfilling makes you feel satisfied because it allows you to use all your skills and qualities: A career in nursing still provides one of the most fulfilling of jobs.