一块 (pinyin: yī kuài, written "yi kuai" or "yikuai") means a piece; a chunk. Below: its meaning, pronunciation, stroke order, and example sentences, so you can learn how to read, say, and write 一块.
Meaning
a piece; a chunk
(fig.) (coll.) (typically preceded by a specifier such as 這|这[zhe4]) aspect; area; dimension (Example: 情感這一塊|情感这一块[qing2 gan3 zhe4 yi1 kuai4] "the emotional aspect (of it)")