trembler

jänishousu One who, or that which, trembles.
Any of various New World passerine birds of the family Mimidae.
The vibrating hammer, or spring contact piece of a hammer break, as of the electric ignition apparatus for an internal combustion engine.
to shake
to tremble
to tremble; to quiver; to shake
(alternative form of)
circa 1250, wikipedia:Marie de France|Marie de France, w:Lais of Marie de France|Equitan

m'est une anguisse el quer ferue, ki tut le cors me fet trembler

: Such a pain has pierced my heart, that makes my whole body quiver