instabilis (not firm, regular, etc.; PROP. and IMPROP.). [Vid: INCONSTANT.] An unsteady hand (in writing), vacillantes literulae (Cic.): an unsteady gait, instabilis ingressus (Liv.), gradus (Curt.): an unsteady line (of soldiers), instabilis et fluctuans acies (Liv.): an unsteady hand, tremebunda or tremula manus (e.g., of a drunken man); manus intremiscens (e.g., of a surgeon). An unsteady light, tremulum lumen († Verg.). If = immoral, profligate, Vid.