polysynthetic

English

poly- +‎ synthetic

Examples (grammar)
Ojibwe is a polysynthetic language where ngii-nitaa-ozhibii'amaadimin (“we used to write to each other”) is a possible word.

polysynthetic (comparative more polysynthetic, superlative most polysynthetic)

(grammar, of languages) Characterized by a prevalence of relatively long words containing a large number of morphemes. Typically, the morphemes are bound.
- 1912, Sir Arthur Conan Doyle, The Lost World‎:
  "No doubt, sir," Summerlee answered. "Like all such tribes, I shall expect to find them of polysynthetic speech and of Mongolian type." "Polysynthetic certainly," said Challenger, indulgently.
(mineralogy) Having layers of twin crystals

polysynthetic