Reduplication

Full reduplication copies the entire base — Indonesian buku "book" → buku-buku "books"; Mandarin xing "OK" → xingxing "very OK." Partial reduplication copies a portion, often a CV or CVC syllable from the left or right edge. Tagalog has CV partial reduplication for future tense — sulat "write" → susulat "will write." Pangasinan has CVC reduplication — too "person" → toótoo "people." Reduplicants can prefix (most common, called preposed), suffix, or infix. The size and shape of partial reduplicants are predictable from prosodic templates rather than counted segments.

John McCarthy and Alan Prince's 1986 manuscript "Prosodic Morphology" (eventually published in pieces, fully in 1995 in University of Massachusetts Occasional Papers) showed that reduplicative shapes correspond to prosodic categories — light syllable (CV), heavy syllable (CVV/CVC), foot, or prosodic word — not to a fixed number of segments. A reduplicant analyzed as "the first three sounds" varied across words; analyzed as "a heavy syllable" it stayed constant. This insight applied beyond reduplication to truncation, hypocoristics, and language games. The framework became central in Optimality Theory after McCarthy and Prince's "Faithfulness and Reduplicative Identity" (1995).

Across languages, reduplication marks: plurality (Indonesian rumah-rumah "houses"), distributive (Latin quisque "each"), intensification (English "very, very" or "good good"), attenuation (Tagalog kaunti "a little" → kakaunti "a tiny bit"), repetition or habitual aspect (Mokilese roarroar "is laughing"), reciprocity (Hebrew hitkattev "they wrote to each other"), diminutive (Afrikaans dingetjie-dingetjie "little things"), and lexical conversion (Mandarin kanchan "look at" full reduplication, mild request). Edith Moravcsik (1978) and Carla Hurch (2005) cataloged these patterns. The recurrence of "more form, more meaning" iconicity is striking.

Both. Indonesian and Tagalog reduplication is fully productive — speakers apply it to novel words. English reduplication is largely lexical and limited — "boo-boo," "no-no," "tut-tut," "shilly-shally." Edward Sapir noted English contrastive focus reduplication ("a salad-salad," meaning a real salad, not a pasta salad), studied by Jila Ghomeshi, Ray Jackendoff, Nicole Rosen, and Kevin Russell (2004) as identical-constituent compounding. Some languages have semi-productive systems — Mandarin reduplicates some adjectives (hong "red" → hongtonghong "very red") but not others. Productivity correlates with morphological richness in Hopper and Traugott's grammaticalization framework.

Three approaches compete. The phonological copying approach (early generative) treats the reduplicant as a phonological copy created by rule. The morpheme approach (Marantz, 1982) treats it as a CV-skeleton template that is filled by the base. The Base-Reduplicant Correspondence Theory (McCarthy and Prince, 1995) treats the reduplicant and base as two related forms in Optimality Theory, with constraints governing identity and faithfulness. Inkelas and Zoll's Morphological Doubling Theory (2005) treats reduplication as compounding of two semantically identical morphemes. Each captures different empirical generalizations.

No. Many functions are language-specific. Pingelapese roar reduplicated marks progressive, not plural. Sundanese reduplication marks plural for some nouns and emphasis for others. Salishan languages (e.g., Lillooet) have multiple reduplication types — diminutive, augmentative, "out of control" — each with distinct shapes and meanings. Some reduplications change part of speech — Indonesian gunung "mountain" → gunung-gunung "mountains," but jadi "become" → jadi-jadi "irregularly become." Linguists must establish meanings empirically; cross-linguistic glosses can mislead.

Bloomfield's Language (1933) discussed reduplication briefly. Structuralist work on Tagalog (Bloomfield, 1917; McKaughan and Macaraya, 1967) and Tongan (Churchward, 1953) provided early data. Roman Jakobson's 1960 paper on the iconicity of reduplication framed it as quantitative iconicity — "more of the same form, more of the same meaning." McCarthy and Prince's prosodic morphology (1986) shifted the field to template-based analysis. Lakatos (1989), Inkelas and Zoll (2005), and Lev Blumenfeld (2006) extended into multiple frameworks. Reduplication remains a key testing ground for morphology-phonology interface theories.