Simple past tense and past participle of bolden.(verb)
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Use "boldened" in a sentence
"The b element represents a span of text to be stylistically offset from the normal prose without conveying any extra importance, such as key words in a document abstract, product names in a review, or other spans of text whose typical typographic presentation is boldened."
"#475 Reggie and bizarro-I boldened the part on minorities because ElBruce denied that the House Bill had provisions set forth that was affirmative action on steroids."
"I must not be average then,Ive boldened the ones Ive read, Those that are left , theres none I intend to read."