らく

Etymology 1
From the contraction of final る (ru) in some forms with earlier.

Usage notes

 * This form is used after the of, , , and  verbs - as well as following the  or  of  verbs; e.g. , , , ,.

Etymology 2
The reading of various kanji.

Adjective

 * 1)  comfortable, easy

Noun

 * 1)  comfort, ease;