1) Imperishable 2) Not subject to decay 1) Imperishable 
• (a.) Not putrescible.
Im`pu·tres'ci·ble adjective [ Prefix im- + putrescible : confer French imputrescible .] Not putrescible. 
[adj] - not subject to decay
imputrescible Not putrescible or subject to decomposition or putrefaction; incorruptible: 'They used a tanning process to make skins imputrescible.'
adjective not subject to decay
not liable to decomposition or putrefaction; incorruptible: a tanning process to make skins imputrescible.