to add (something) at the end of what has been stated; append
Origin of subjoinMiddle French subjoindre ; from Classical Latin subjungere: see sub- and amp; join
transitive verbsub·joined, sub·join·ing, sub·joins
To add at the end; append.
Origin of subjoinObsolete French subjoindre, from Latin subiungere : sub-, sub- + iungere, to join; see yeug- in Indo-European roots.