The word "unshaky" means firm, unwavering, and unshakable. Some possible antonyms for this word include shaky, unstable, uncertain, hesitant, unsure, diffident, and unreliable. Shaky implies a lack of stability or consistency, while unstable suggests a tendency to waver or falter. Uncertain denotes a lack of conviction or confidence, while hesitant implies a reluctance to act decisively. Unsure suggests a lack of knowledge or information, while diffident suggests a lack of self-assurance or assertiveness. Finally, unreliable implies a lack of trustworthiness or dependability. By contrast, unshaky denotes a steadfast, resolute, and determined attitude, one that is not easily swayed or shaken.