难凭
undependable adj 1: not worthy of reliance or trust; "in the early 1950s computers were large and expensive and unreliable"; "an undependable assistant" [syn: {unreliable}] [ant: {reliable}, {reliable}] 2: not to be trusted [syn: {unreliable}] 3: liable to be erroneous or misleading; "an undependable generalization" [syn: {unreliable}]