inconstant.

Not steady or consistent in affection, loyalty, behavior, or another quality.

Use it for

Words that belong together

• inconstant affection
• an inconstant ally

On the page

His inconstant affection taught her to distrust the warmest letters.

An inconstant ally could be more dangerous than an acknowledged opponent.

Usage notes

Primary category: literary. Forms: Comparative more inconstant; superlative most inconstant where gradation is meaningful. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.