accelerate add adjoin affix agglutinate aggravate annex append attach ball up beef up blow up burden concentrate condense confound confuse conjoin consolidate decorate deepen derange disarrange disorder double embrangle encumber enhance entangle exacerbate exaggerate foul up garble glue on heat up heighten hitch on hop up hot up implicate infix intensify involve jazz up join with jumble key up knot louse up magnify make complex make unintelligible mess up mix up muck muck up muddle mystify obfuscate obscure ornament paste on perplex plus postfix prefix put with ramify ravel redouble reinforce saddle with scramble screw up shadow sharpen slap on snafu snarl snarl up soup up step up strengthen subjoin suffix superadd superpose tack on tag tag on tangle triple unite with upset whet