This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Serving, tending, or having the power to manipulate.

n. Any of various objects designed to be moved or arranged by hand as a means of developing motor skills or understanding abstractions, especially in mathematics.

adj. Tending to manipulate others.

adj. Reaching one's goals at the expense of other people by using them.

n. A manipulable object designed to demonstrate a mathematical concept.

adj. Of or pertaining to manipulation; performed by manipulation.

adj. Prone to attempt to influence others by devious or subtle psychological means, in order to induce them to do what one wants.

n. Any object given to children to encourage them to learn by manipulating physical objects; applied especially to solid objects of varying geometrical shape that can be fit together to form larger aggregates.

Of or pertaining to manipulation: as, manipulative power or skill.

adj. skillful in influencing or controlling others to your own advantage

"These days, as an increasing number of adults are discovering what teenagers have long known: Texting lends itself particularly well to manipulative or, in other words, juvenile behavior."

artful   

devious    self-serving    sneaky    deceitful    dishonest