Tā zìzì kēngqiāng, kāngkǎi jī'áng de fābiǎo le yǎnjiǎng.
His every word rang with power as he delivered his passionate speech.
Tips
grammar
字字 is a reduplicated form of 字 (character/word), used as an intensifier meaning 'every single word'. Common collocations include 字字珠玑 (every word is a gem) and 字字血泪 (every word drenched in blood and tears).