This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Resembling a precipice; extremely steep. See Synonyms at steep1.

adj. Having several precipices: a precipitous bluff.

adj. Usage Problem Extremely rapid, hasty, or abrupt; precipitate: "The change has included a precipitous collapse of Communist authority” ( New York Times). See Usage Note at precipitate.

adj. Steep, like a precipice; as, a precipitous cliff or mountain.

adj. Headlong; as, precipitous fall.

adj. Hasty; rash; quick; sudden; precipitate; as, precipitous attempts.

adj. Steep, like a precipice.

adj. Headlong.

adj. Hasty; rash; quick; sudden; precipitate.

Headlong; descending rapidly, or rushing onward.

Steep; like a precipice; consisting of precipices: as, precipitous cliffs.

Hasty; rash; precipitate.

Hastily appearing or passing; sudden.

Synonyms and See. precipitate, a.

adj. done with very great haste and without due deliberation

adj. extremely steep

hurried    steep   

gentle   

headlong    hasty    rash    quick    sudden    precipitate    steep    perpendicular    sheer    cliffy   

Serendipitous    serendipitous   

rocky    mountainous    craggy    perpendicular    impassable    snow-covered    uneven    abrupt    volcanic    woody