Meaning and elaboration
Meaning: The one who is realizable, who is to be accomplished, or who is attainable through spiritual discipline.
Elaboration
The name Sādhya means "that which is to be realized," "that which is to be accomplished," or "that which is attainable through spiritual discipline." It points to the highest aim of spiritual life and affirms that Mahakali is not only to be worshipped, but to be directly realized.
The Supreme Aim (Sādhya) In yogic and Tantric traditions, Sādhya is the final aim toward which all spiritual practice (Sādhanā) moves. Kali as Sādhya means that she is the supreme objective, the highest truth, and the realization the sadhaka seeks. She is not merely a deity to be adored from a distance, but the living Divine Reality to be known, experienced, and embodied within.
Attainable Through Sādhanā To call her Sādhya is also to say that she is attainable. Though transcendent, she is not inaccessible. Through sincere spiritual discipline (Sādhanā), devotion (Bhakti), knowledge (Jnana), and ritual practice (Kriya), the devotee can approach her and come into living contact with her presence. This name reassures the seeker that spiritual effort is not in vain, and that union with the Divine Mother is truly possible.
The Fruit of Practice (Sādhanā Phala) Sādhya also names the fruit or fulfillment of Sādhanā. When a devotee steadily walks the path, the vision, realization, or union with Kali Herself becomes the highest accomplishment. She is the destination toward which all practice moves, and in a deeper sense, the power that draws the aspirant toward herself. This name inspires perseverance and gives profound purpose to the spiritual journey.