Radical 冫

3 strokes

習

ice 冫 (360a) + blade (231a) = practice 习

Notice that “ice” is usually on the left-hand side but here it is enclosed by “blade”.

学习 (82) xuéxí to study, learn

复习 (550) fùxí review (a lesson)

练习 (714) liànxí to practice

预习 (642) yùxí preview, prepare

He uses an ice blade to practice his fencing skills. / The fairy conjures up an insulated sheath to keep it in.