The Spanish word 'apa' comes directly from Quechua, the ancient language of the Inca Empire that is still spoken today in parts of South America. In Quechua, 'apa' means 'load' or 'burden', and this meaning was borrowed unchanged into Spanish, particularly in regions with strong Quechua influence.

Since 'apa' is a direct borrowing from Quechua, there aren't many common Spanish words that are etymologically related to it. This reflects the distinct origin of this word from indigenous American languages rather than from Latin or Greek roots that are more common in Spanish vocabulary.

There aren't any common English words that are etymologically related to 'apa', as it comes from Quechua, an indigenous South American language family that had no historical contact with English. Any similar-sounding English words would be purely coincidental.