crudus.

Disputed. Perhaps from Proto-Indo-European *krewh₂-. * It may be dissimilated from earlier *crūrus, from Proto-Italic *krūros, itself from *kruh₂rós, from *krewh₂- (“raw meat, fresh blood”). Alternatively, Sihler suggests dissimilation from a pre-form *krowros. However, De Vaan argues that the required dissimilation is unusual and "cannot be accepted without further support." * Nussbaum has suggested that the term may derive from *krewh₂-idʰos. However, according to De Vaan, such a PIE form would be expected to develop into Proto-Italic *krowiðos, which could only produce crūdus via syncope. Thus, De Vaan doubts this etymology, arguing that syncope is unusual for adjectives in -idus. * De Vaan alternatively suggests a possible derivation from *krowoðos, from *krewh₂-odʰ-os. Cognate with English raw.