V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
Entry अतल
अतलatalaa.Bottomless.
Bottomless.
Derived forms and compounds
-लम् [अस्य भूखण्डस्य तलं पृषोdenotes that the rest of the word under consideration is to be suppliedइदमोऽत्वम्] Name of a पाताल or lower region, one of the 7 Pātālas, being the first among them.
-लःName of Śiva.
-स्पृशू -स्पर्शAdjective [न. तले स्पृश्यते कर्मणि क्विप्; न तलस्य स्पर्शो यत्र] bottomless, very deep, unfathomable.