The compound 'whole-word' is a modern English formation, combining two ancient Germanic roots. 'Whole' descends from the Proto-Germanic 'hailaz', meaning 'undamaged' or 'complete', which itself stems from the Proto-Indo-European 'kóylos', signifying 'healthy' or 'unharmed'. 'Word' originates from Proto-Germanic 'wurdan', related to the act of speaking, from the PIE root 'werh₁-', meaning 'to speak' or 'to say'. The compound term emerged in the 20th century, primarily within educational and linguistic contexts, to describe an approach that treats a lexical item as an indivisible semantic unit, logically extending from the concept of a 'complete utterance'.

Structure: whole (entire) + word (unit of language) - whole: From Old English 'hāl' (sound, entire). Germanic origin. Functions as an adjective modifying the noun. - word: From Old English 'word' (speech, utterance). Germanic origin. Functions as the core noun being modified.