disc▪ The lexicons differ in their treatment of items with the root consonants QHW/Y. Some keep ↗√QHW disctinct from ↗√QHY, others treat all items under one root. Among those who keep the two apart, there is no unanimity as to the grouping of individual items either under QHW or QHY. There may also be overlapping with, or contamination by, ↗√KHY and ↗√KHH. As long as the situation remains such confused, it is impossible to decide what should be regarded as cognates.
▪ For the Arab lexicographers, the notion of ‘taking away o.’s appetite’ is the reason why wine, and then also coffee, were called ↗qahwaẗ. Therefore, they regard qahwaẗ‑ as a derivative of qahiy‑.