IPA: /kɒnˈkwɪstəˌdɔːr/
KK: /kɒnˈkwɪstəˌdɔr/
A conqueror, particularly a Spanish soldier from the 16th century who defeated native civilizations in regions like Mexico and Peru.
The conquistador led his troops into the heart of the Aztec Empire, seeking gold and glory.
Conquistador → It is formed from "con-" (meaning together) and "quistar" (from Latin "quaerere", meaning to seek or acquire). The word refers to someone who seeks to conquer or acquire land and resources, particularly in the context of the Spanish conquests in the Americas.
Think of someone 'seeking' ('quaerere') to 'conquer' ('con-') new lands — that's what a conquistador does.
No commonly confused words.