willful

形容词 willful:

1. done by design
   同义词：intentional, wilful
2. habitually disposed to disobedience and opposition
   同义词：froward, headstrong, self-willed, wilful

1. A willful man must have his way.
   [谚]只要人有恒，万事皆可成。
2. Given to recalcitrant behavior; willful or perverse.
   顽固的，任性的好与人作对的; 执拗的或故意作对的
3. Given to or marked by willful, often perverse deviation from what is desired, expected, or required in order to gratify one's own impulses or inclinations.
   任性的具有或以任性为特征的，通常与为了满足某人自己的冲动或癖好所期待、盼望或要求的完全相反

willful 也作 wil.ful

adj.（形容词）
Said or done on purpose; deliberate.See Synonyms at voluntary
故意的：故意说的或做的；存心的，有意的参见 voluntary
Obstinately bent on having one`s own way.See Synonyms at unruly
固执的，任性的：顽固地按自己的方式的参见 unruly

【引伸】
will.fully
adv.（副词）
will.fulness
n.（名词）