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open the batting
start the first innings in cricket
open the door
Physically move a door to enter or exit.
open the floodgates
to cause a large release of something
open the kimono
reveal private information or plans
open the schools
to allow schools to operate again.
open wide
a command to widen one's mouth
open-door policy
a policy allowing free access or communication.
opener
the beginning or introductory part
opengl
A graphics library for rendering 2D and 3D graphics.
opening
gap or hole
opening of an envelope
A simple, easy task with little excitement.
openly
In a way that is visible to all.
openness
Willingness to share thoughts and feelings.
opera
the art form of opera performance
operable
Able to function or be repaired.
operandi
A way of working or doing things.
operate
to function or work
operatic
Relating to opera or its style.
operation
surgical procedure
operational
relating to how something functions
operationally
In terms of operations or functioning.
operative
Functioning or working effectively.
operator
a person who controls or manages equipment
ophelia
A character in Shakespeare's Hamlet.