Synonyms of true-blue in English:

true-blue


See US English definition of true-blue

See UK English definition of true-blue

See Spanish definition of leal

adjective

1‘true-blue supporters of the club’

SYNONYMS
staunch, loyal, faithful, stalwart, committed, card-carrying, confirmed, dyed-in-the-wool, devoted, dedicated, firm, steadfast, dependable, reliable, trusty, steady, constant, unswerving, unwavering, unfaltering
informal deep-dyed
ANTONYMS

half-hearted