| Waraikú | |
| Also Known As: | Araikú |
| States: | Brazil |
| Region: | Solimões and Jutaí rivers |
| Familycolor: | American |
| Fam1: | Arawakan |
| Fam2: | Northern |
| Fam3: | Upper Amazonian |
| Fam4: | (unclassified) |
| Glotto: | arai1239 |
| Glottorefname: | Araicu |
| Era: | attested 1867 |
| Ref: | [1] |
Waraikú (Araikú) is an extinct, poorly attested, and unclassified Arawakan language. The only record of this language is in a wordlist published in 1867 by Carl Friedrich Philipp von Martius. Both Kaufman (1994) and Aikhenvald (1999)[2] leave it unclassified within Northern Arawakan.