Write the antonyms of the following : (iv) Variable

The antonym of 'variable' is constant. Other suitable antonyms include fixed, stable, and unchanging. The most direct and commonly used antonym, however, remains 'constant'.

Detailed Explanation of Antonyms

1. Constant

‘Constant’ signifies something that remains unchanged over time or in different conditions. It directly opposes the idea of ‘variable’ which implies change. For example, the speed of light is often referred to as a constant.

2. Fixed

‘Fixed’ suggests something that is firmly established and not easily altered. While similar to ‘constant’, ‘fixed’ often implies a deliberate setting or determination. A fixed income, for instance, is not subject to variation.

3. Stable

‘Stable’ indicates a condition of equilibrium and resistance to change. It suggests a lack of fluctuation or instability. A stable economy, for example, doesn’t experience wild swings in growth or decline.

4. Unchanging

‘Unchanging’ is a more literal antonym, directly negating the concept of change inherent in ‘variable’. It emphasizes the permanence of something. For example, some fundamental laws of physics are considered unchanging.

The choice of the most appropriate antonym depends on the specific context. However, in most general applications, 'constant' serves as the most accurate and widely understood opposite of 'variable'.