transitive verb
also obfirmate
( -ed/-ing/-s )
Etymology: obfirm from Latin obfirmare, offirmare, from ob-, of- to, against, over + firmare to make firm; obfirmate from Latin obfirmatus, offirmatus, past participle of obfirmare, offirmare to make firm — more at ob- , firm
obsolete : to make obdurate