第 (Kanji for rank or number in series)

Onyomi

DAI

My younger brother is ranked first at DYING a panda-related death (his hobby is dressing up like bamboo),

第一(だいいち)	first or primary ★★★☆☆ 第 (rank or number in series) + 一 (one) = 第一 (first or primary) the first (impression, priority, episode/ game of the season) the primary thing.
第一位(だいいちい)	first rank. ★★★☆☆ 第一 (first or primary) + 位 (rank) = 第一位 (first rank.)
第7章(だいななしょう)	chapter 7 ★★☆☆☆ 第 (rank or number in series) + 章 (emblem / chapter) = 第7章 (chapter 7)
第二段(だいにだん)	second step ★☆☆☆☆ 第 (rank or number in series) + 二 (two) + 段 (step / stairs) = 第二段 (second step ) the second step (in a plan for world domination)

	Meaning	Hint	Radical
第	rank or number in series	YOUNGER BROTHER	弟
等	equal /etc./plural	TEMPLE	寺

My YOUNGER BROTHER comes after me in our family series.

According to the U.S. Constitution, all TEMPLES are equivalent.- Congress shall pass no law and etc.