आस्थायāsthāyaind.p. having recourse to, using, employing
तं तं नियममास्थाय प्रकृत्या नियताः स्वया ॥
कोशःDictionaries
Apte, Monier-Williams and Macdonell at once. Type in any of fifteen scripts and schemes; the word is converted and looked up wherever it is part of a headword.