Englishfor English speakers
observance
—
noun
(= observation)
the act of observing; taking a patient look
—
noun
(= honoring)
conformity with law or custom or practice etc
—
noun
(= notice)
the act of noticing or paying attention
he escaped the notice of the police
—
noun
(= ceremony)
a formal event performed on a special occasion
a ceremony commemorating Pearl Harbor
of
Preposition
—
Made using.
It is a house of cards.
an
Determinative
—
An (or a) is used when the following word could be any of a certain type.
I just ate an apple.
It is indeed an honor to have met you today.
obligation
Noun
—
An obligation is a duty, something you must do.