Precipitous
/pɹɪˈsɪpɪtəs/
adjective
Steep, like a precipice
“a precipitous cliff”
Headlong
“a precipitous fall”
Hasty; rash; quick; sudden
“precipitous attempts”
Synonyms: heedless, hotheaded, impetuous, headlong, precipitant, precipitous, brant, steep-to