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

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v. To improve in appearance or stylishness; spruce up.

v. To make quicker: smarten the pace.

verb-intransitive. To make oneself smart or smarter.

v. To make smarter in appearance; to refurbish or spruce up

v. To increase speed

v. To make smart or spruce; -- usually with up.

To make smart or spruce; render brisk, bright, or lively: often with up.

To smart; be pained.

"But expect is the operative word and unless the labels smarten up, that definitely won`t be the case."

smartened    smartening    smartens   

spruce   

Barton    Martin    Spartan    Tartan    barton    carton    harten    hearten    marten    martin