1890 (attested from 1860 as a foreign word), from Swahili, literally "journey, expedition," from Arabic, literally "referring to a journey," from safar "journey" (which itself is attested in English as a foreign word from 1858). Used from 1920s of various articles of clothing suitable for safaris.
sadistic
sadly
sadness
sado-masochism
sado-masochist
safari
safe
safecracker
safeguard
safe-keeping
safely