1 weak or trembling with age, illness etc: a shaky voice; shaky handwriting.
az: titrək (səs)
ru: трясущийся, нетвёрдый
2 unsteady or likely to collapse: a shaky chair.
az: əsən, yırğalanan, titrəyən
ru: непрочный, шаткий
3 (sometimes with at) not very good, accurate etc: He's a bit shaky at arithmetic; My arithmetic has always been very shaky; I'd be grateful if you would correct my rather shaky spelling.
az: zəif, qeyri-müəyyən
ru: слабый, неуверенный