I. noun
( -s )
Etymology: Middle English, from gerund of tremblen to tremble
: the action or condition of one that trembles: as
a. : tremble II 3
b. : louping ill
II. adjective
Etymology: from present participle of tremble (I)
: that trembles : shaking with or as if with fear or other emotion : fearful , vibrating, quaking
• trem·bling·ly adverb
• trem·bling·ness noun -es