1. The quality of being inconsistent, unreliable, or subject to frequent change; lack of steadfastness
His inconstancy in relationships made it difficult for others to trust him.
A inconstância dele nos relacionamentos dificultava que outros confiassem nele.
2. Fickleness; the tendency to change one's mind or loyalties frequently
The politician was criticized for his inconstancy regarding environmental policies.
O político foi criticado pela sua inconstância a respeito das políticas ambientais.
3. Variability or changeability in nature or behavior
The inconstancy of the weather made planning outdoor activities challenging.
A inconstância do tempo tornava desafiador planejar atividades ao ar livre.