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

• Lexulous
• Wordscraper
• Wordosaur

v. To attach firmly to something else, as by pinning or nailing.

v. To make fast or secure.

v. To close, as by fixing firmly in place.

v. To fix or direct steadily: fastened her gaze on the stranger.

v. To place; attribute: fastened the blame on the weather.

v. To impose (oneself) without welcome.

verb-intransitive. To become attached, fixed, or joined.

verb-intransitive. To take firm hold; cling fast: fasten on a notion.

verb-intransitive. To focus steadily; concentrate: All eyes fastened on the speaker.

v. To attach or connect in a secure manner.

v. To fix firmly; to make fast; to secure, as by a knot, lock, bolt, etc.

v. To cause to hold together or to something else; to attach or unite firmly; to cause to cleave to something , or to cleave together, by any means

v. To cause to take close effect; to make to tell; to lay on.

verb-intransitive. To fix one's self; to take firm hold; to clinch; to cling.

To make fast; cause to adhere; join, connect, or attach firmly; fix or secure in place or position by any physical means: as, to fasten a door with a lock, bolt, or chain; to fasten boards together with nails or screws, or by mortise and tenon; to fasten clothing with buttons, pins, clasps, etc.

Figuratively, to attach or unite by any connecting link or agency; connect or join firmly in general: as, to fasten a nickname or a charge upon one; to fasten one's hope on a promise.

To make firm or stable; establish; confirm; clench: as, to fasten a bargain.

To lay on; cause to reach.

= Syn 1 and To bind, attach, tie, link, affix, annex.

To become fast or fixed; become attached or firmly joined; close firmly.

To take firm hold; cling: generally with on.

n. A Middle English form of fast.

v. become fixed or fastened

v. make tight or tighter

v. attach to

v. cause to be firmly attached

"It is a good job I have a sense of humour, was almost going to send you the number of a good tailor that has a line in jackets that fasten from the back"

to fasten a crime upon   

fastened    fastening    fastens   

attach   

attach    hold    keep    impose   

stick    fix    link    affix    annex    cement    clinch    cling   

Masson    assassin    bason    classon    fason   

strap    cuff    buckle    fastener    fastening    latch    ankle    leggings    waist    thong