WordNet sense 1 (contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse):

condom, prophylactic, rubber, safety

WordNet sense 2 (financially sound):

dependable, good

WordNet sense 3 (financially secure and safe):

sound

WordNet sense 4 (free from danger or risk):

secure

WordNet sense 5 (free from danger or injury):

unhurt

WordNet sense 6 (thought to be devoid of risk):

riskless

WordNet sense 7 (unlikely to harm or disturb anyone):

harmless, innocuous

WordNet sense 8 (lacking in boldness):

unadventurous