remifentanil
C2CEFR level
97/100Rarity: very rare
TechnicalRegister
An ultra-short-acting synthetic opioid metabolised by plasma esterases, giving a context-insensitive half-life.
A remifentanil infusion provided profound intraoperative analgesia that dissipated within minutes of discontinuation.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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