Guayabero has 6 vowels: /a, e, i, ɨ, o, u/.
| Open | Open-mid | Close-mid | Close | ||||
|---|---|---|---|---|---|---|---|
| unr. | rnd. | unr. | rnd. | ||||
| Front | oral | æ | ɛ | e | ø | i | |
| nasal | ẽ | ĩ | |||||
| Central | oral | a | ɞ | ɵ | ɨ | ||
| nasal | ã | ɨ̃ | |||||
| Back | oral | ɑ | ʌ | ɔ | ɤ | o | u |
| nasal | õ | ũ | |||||
| Bilabial | Alveolar | Postalveolar | Palatal | Velar | Glottal | ||
|---|---|---|---|---|---|---|---|
| Stop | voiceless | p | t | c | k | ʔ | |
| voiced | b | d | ɟ | ɡ | |||
| Affricate | t͡ʃ | ||||||
| Fricative | voiceless | ɸ | s | ʃ | ç | x | h |
| voiced | β | z | ʒ | ʝ | ɣ | ||
| Nasal | m | n | ɲ | ŋ | |||
| Approximant | l | j | ɰ | ||||
| Flap | ⱱ̟ | ɾ | |||||