## Adolescent: The Grammar of Growing Up
Few English words encode the philosophy of human development as precisely as **adolescent**. Borrowed into Middle English around 1440 from Old French, itself from the Latin present participle *adolēscēns*, the word means 'one who is in the process of growing up.' Its companion **adult** — from the past participle *adultus* of the same verb — means 'one who has grown up.' Together they form one of the most instructive grammatical doublets in English.
### The Latin Verb: adolēscere
The verb *adolēscere* means 'to grow up, to come to maturity.' It compounds *ad-* ('toward') with *alēscere* ('to grow'), an inchoative of *alere* ('to nourish'). Inchoative verbs denote the beginning or progressive unfolding of an action — thus *alēscere* is 'to begin growing.' The present participle *adolēscēns* ('growing up') and past participle *adultus* ('grown up') were both used substantively in classical Latin (Lewis & Short, 1879).
### The PIE Root: *h₂el-
The root **\*h₂el-** ('to grow, to nourish') is one of the most productive in Indo-European (Watkins, 2011). In Latin: *alere* (nourish), *alimentum* (food → **aliment**), *alumnus* (foster child), *prōlēs* (offspring → **proletariat**), *abolēre* (to destroy = to un-grow → **abolish**), *coalēscere* (to grow together → **coalition**).
In Germanic, regular sound changes produced Proto-Germanic *\*aldaz* ('grown'), giving Old English **eald** ('old'). The semantic shift — 'to grow' → 'grown' → 'old' — is natural and cross-linguistically attested. From *eald*: **elder**, **eldest**, **alderman** (OE *ealdormann* 'chief'). The word **world** itself partly descends from this root: OE *weorold* from PGmc *\*wer-aldiz* ('age of man'), where the second element is from *\*h₂el-* (OED, s.v. 'world').
### The Adolescent/Adult Doublet
The relationship deserves emphasis:
- **Adolescent** ← *adolēscēns* (present participle): 'one who IS growing up' - **Adult** ← *adultus* (past participle): 'one who HAS grown up'
The difference is purely one of grammatical aspect — present vs. completed. English preserves this Latin aspectual distinction as a fossilised semantic pair.
In Roman law, *adolēscentia* designated the period from the *toga virilis* (~age 15) to approximately age 25, when full legal capacity was attained — a broader range than modern usage. The Roman *adolēscēns* was a precisely defined legal status with implications for guardianship and property rights.
### The Modern Concept: G. Stanley Hall
The modern concept of adolescence as a distinct psychological stage dates to **G. Stanley Hall's** *Adolescence* (1904), the first major scientific treatment. Hall characterised it as a period of 'storm and stress,' arguing the turmoil recapitulated evolutionary stages. Though many specifics have been superseded, his insight that adolescence requires its own developmental framework transformed psychology and education.
### References
- De Vaan, M. (2008). *Etymological Dictionary of Latin*. Brill. - Hall, G. S. (1904). *Adolescence*. 2 vols. D. Appleton. - Lewis, C. T. & Short, C. (1879). *A Latin Dictionary*. Clarendon Press. - OED, s.v. 'adolescent,' 'adult,' 'world.' - Watkins, C. (2011). *American Heritage Dictionary of Indo-European Roots*. 3rd ed.