art-, arti- +

1. The inability or unwillingness to move or to act.
2. In physics, the tendency of a body to remain in its state (at rest or in motion) until acted upon by an outside force.
3. Inactivity; inability to move spontaneously; sluggishness.
4. Resistance or disinclination to motion, action, or change: "The inertia of an entrenched bureaucracy is nothing new."
5. Etymology: used as a term in physics during the 17th century by the German astronomer and physician, Johann Kepler (1571-1630); from Latin inertia, "unskillfulness, idleness"; from iners, inertis, "unskilled, inactive"; from Latin in-, "not + ars, artis, "skill, the method, way, an art, faculty". Used in Modern Latin by Newton (1687).

The sense of "apathy" was first recorded in 1822.

A reference to, or relating to, inertia.

1. Not moving or not able to move.
2. Not readily changed by chemical or biological reaction.
3. Lacking in energy or motivation.

1. A French school of art and architecture popular in the 1890s; characterized by stylized natural forms and sinuous outlines of such objects as leaves and vines and flowers.
2. A body of creative artists or writers or thinkers linked by a similar style or by similar teachers in a school.

Energetic idleness; masterly inactivity -Horace

The ability of a material to store heat and to resist temperature changes, dependent on its density and specific heat.

Strength, arts, morals.

Motto of Florida State University, Tallahassee, Florida, USA.

Force of inertia.

In physics, the force of inertia; by extension, this may be applied to resistance in matters of social progress or change. It explains why a plan set in motion is difficult to stop, and vice versa.