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Soil salinity has long been regarded as one of the most serious environmental constraints limiting agricultural crop growth and productivity. The goal of this study was to analyze the morpho-physiological and biochemical alterations of basak plants at varying salinity levels by a pot experiment. The experiment was set up in a Randomized Complete Block Design (RCBD) with five replications. The three different salinity levels (4 dS/m, 8 dS/m and 12 dS/m) and control (tap water) comprised the four different treatments in this investigation. The study showed that all parameters viz growth, physiological and biochemical were influenced significantly by different seawater induced saline treatments over time. Different morpho-physiological features, such as plant height, number of leaves, number of branches, and total dry matter (TDM) were shown to be decreased with increasing salinity as compared to control. However, chlorophyll (Chl) a, Chl-b, total Chl and carbohydrate content of basak plants were also negatively associated with increasing different seawater induced salinity levels. In response to seawater stress plants accumulate several biochemical compounds. In that case, the accumulation of proline (Pro), total phenol, MDA content and total antioxidant activities were found to be highest when plants were exposed to the uppermost salinity level i.e. 12 dS/m. Collectively, the findings reveal that, while seawater-induced salinity had a substantial impact on basak growth and biochemical parameters, all plants were able to endure a wide range of salinity levels, demonstrating the basak plant's ability to cope with salt-induced membrane damage.