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Front

Inconspicuous

Back

Not noticeable; unobtrusive.

Front

Full of complaints; complaining

Back

Querulous: expressing a complaint or grievance.

Front

The exterior boundary

Back

Periphery: the outer limits or edge of an area.

Front

Emotionally unstable

Back

Neurotic: characterized by anxiety, fear, or emotional instability.

Front

Lacking in ability; incompetent

Back

Inefficient: not achieving maximum productivity; wasting or failing to make the best use of time or resources.

Front

A person who complains frequently

Back

Querulous: someone who is habitually complaining.

Front

The outermost part of something

Back

Periphery: the outer boundary or surface.

Front

A state of emotional instability

Back

Neurosis: a mental condition characterized by anxiety and emotional distress.

Front

To act in a way that does not attract attention

Back

Unobtrusively: in a way that is not conspicuous or attracting attention.

Front

A person who is unable to perform tasks effectively

Back

Inefficient: lacking the ability to perform tasks in a competent manner.