RF.2.3ef Irregulary Spelled Words

CCSS.ELA-Literacy.RF.2.3e Identify words with inconsistent but common spelling-sound correspondences.
CCSS.ELA-Literacy.RF.2.3f Recognize and read grade-appropriate irregularly spelled words.
An irregularly spelled word is one that does not follow a pattern. They are often difficult to sound out, so you have to memorize the way they look.