The common Spanish abrir, for “open”, comes from the Latin for the same, aperio.
From the same root — in an “ahhhh!” moment — is the English, aperture, the opening of the camera. The sort of word you learn if you ever try to figure out how to use an analog camera!
The a-b of abrir maps to the a-p of aperture, with the “b” and “p” being often and easiliy exchanged.
The Spanish for “around”, alrededor”, comes from the same root as the English “round”: both come from the Latin rota, meaning, “wheel.”
The Spanish is a bit less obvious because of its al- prefix — which was originally a separate word, originally, “al rededor.” Thus, the r-(n)-d of round maps to the (al)-r-d of alrededor.
Spanish for “lawyer,” abogado is a cousin of the English uncommon synonym for the same, advocate (think of it in the noun sense).
Both come from the same Latin root: advocatus, which is a combination of ad- (“towards”) and vocare (“to call”: think of voice, vocal, vocation — literally, your calling!). So a lawyer, or advocate, literally meant, “one called [to help others]”.
Although the sound mappings may not be obvious at first, we can see that the a-b-g-d of abogado maps to the a-v-c-t of advocate.
Suspect and the Spanish equivalent, sospechoso, are easy to identify and obviously the same word, both from the same Latin root, suspectus.
That’s not the interesting part. Rather, as Latin evolved into Spanish, the Latin sound -ct- turned into the Spanish -ch- sound. Think lactose/leche or octagon/ocho.
And suspect falls exactly into this pattern: the English s-s-p-ct maps exactly to the Spanish s-s-p-ch.
Pioneer is literally, one who does something… on foot. Thus it’s related — via the French paonier, from which we get the word — to the Spanish for “foot”, pie. Thus the p-i-vowel opening both words!