Strengthen or make more firm.
synonym: confirm.
Roget 535:
assert;
make an assertion
etc.
n.;
have one's say;
say,
affirm,
predicate,
declare,
state;
protest,
profess.
put forth,
put forward;
advance,
allege,
propose,
propound,
enunciate,
broach,
set forth,
hold out,
maintain,
contend,
pronounce,
pretend.
depose,
depone,
aver,
avow,
avouch,
asseverate,
swear;
make oath,
take one's oath;
make an affidavit,
swear an affidavit,
put in an affidavit;
take one's Bible oath,
kiss the book,
vow,
vitam impendere vero [Lat.];
swear till one is black in the face,
swear till one is blue in the face,
swear till all's blue;
be sworn,
call Heaven to witness;
vouch,
warrant,
certify,
assure,
swear by bell book and candle.
swear by
etc.
(believe)
484;
insist upon,
take one's stand upon;
emphasize,
lay stress on;
assert roundly,
assert positively;
lay down,
lay down the law;
raise one's voice,
dogmatize,
have the last word;
rap out;
repeat;
reassert,
reaffirm.
announce
etc.
(information)
527;
acknowledge
etc.
(assent)
488;
attest
etc.
(evidence)
467;
adjure
etc.
(put to one's oath)
768.
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Dutch: bevestigen