liable (Adjective) — At risk of or subject to experiencing something usually unpleasant. ex. "she is liable to forget"
liable (Adjective) — Subject to legal action. ex. "liable to criminal charges"
liable (Adjective) — (often followed by 'to') likely to be affected with. ex. "liable to diabetes"
liable (Adjective) — Held legally responsible. ex. "men between the ages of 18 and 35 were liable for military service"