accusative case affricate consonant akkadian language albrecht goetze alveolar consonant anatolia anatolian languages ancient greek back vowel bilabial consonant carian language central vowel centum-satem isogloss chrestomathy clitic close vowel consonant craig melchert cuneiform script dative case declension digital object identifier egypt extinct language ferdinand de saussure fricative consonant front vowel grammar grammatical conjugation grammatical gender grammatical mood grammatical number grammatical tense grammatical voice hatti hattians hattic language hebrew bible henri wittmann hittite cuneiform hittite texts hittites hugo winckler hurrian language indo-european languages indo-hittite infinitive instrumental case language family laryngeal theory latin liquid consonant luwian language lycian lydian language mid vowel nasal consonant niger-congo languages old assyrian open vowel palaic language palatal consonant participle pisidian language preterite proto-indo-european language proto-language rhotacism sanskrit semivowel sidetic language supine velar consonant verbal noun vowel warren cowgill