for life

constant continuing deep-rooted enduring inveterate long-lasting permanent persistent

lifetime livelong long-lived long-standing old perennial

short-lived temporary

tenuous

always endlessly eternally permanently

evermore perpetually

durably enduringly everything considered for always for ever and ever for good for keeps forevermore immortally in perpetuity in perpetuum infinitely interminably lastingly now and forever on and on till Doomsday till blue in the face till death do us part till the cows come home till the end of time unchangingly world without end

briefly never temporarily