犠 (Kanji for sacrifice)

You like how this kanji and the previous kanji mean the same thing? And use the same left radical? And are only ever used in the same one word?

What a waste!

If I was you, I'd just study the word 犠牲 and forget about studying the individual kanji.

Sort of reminds you of 喧嘩, doesn't it? Two kanji with the same left- radical that are only used in conjunction with one another.

Onyomi

If it pleases the gods, it is righteous to sacrifice a cow!

犠牲(ぎせい)

a sacrifice ★☆☆☆☆
犠 (sacrifice) + 牲 (sacrificial victim) = 犠牲 (a sacrifice)

a sacrifice - not only religion. You can sacrifice your happiness for someone else. If a bunch of people die in a train wreck, you can use 犠牲。

犠牲者(ぎせいしゃ)

martyr ☆☆☆☆☆
犠牲 (a sacrifice) + 者 (professional) = 犠牲者 ( martyr)

a victim, a martyr