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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

process, physical process go
a sustained phenomenon or one marked by gradual changes through a series of states

phenomenon go
any state or process known through the senses rather than by intuition or reasoning

natural phenomenon go
all phenomena that are not artificial

physical phenomenon go
a natural phenomenon involving the physical properties of matter and energy

mechanical phenomenon go
a physical phenomenon associated with the equilibrium or motion of objects

resistance
any mechanical force that tends to retard or oppose motion

noun.phenomenon

3 Subcategories

friction, rubbing go
the resistance encountered when one body is moved in contact with another
acoustic resistance, acoustic impedance, acoustic reactance go
opposition to the flow of sound through a surface
drag, retarding force go
the phenomenon of resistance to motion through a fluid