sneaky, fast
No, the English word sneaky is not an adverb. It instead serves as an adjective in a phrase or sentence since it does not describe or modify verbs, which is an adverbial function. The pronunciation will be "snee-kee" in the English of the United States of America.
Some example of verbs for an act (action verbs):actbringchewdrilleducatefindgohireirkjumpkneellaughmissSome examples of verbs to be (being verbs):amarebebeenbeingiswaswere
He took a sneaky peek at her phone when she wasn't looking.
Some transitive verbs are:BringSendGiveMakeReadTake
Some past tense verbs that end in 'T' are:BitFeltFoughtHitKeptLeftLostMeantPutSpentTaughtBeatBuiltSetLitNote that verbs ending this way are irregular verbs.
Some verbs beginning with W:WaddleWadeWakeWalkWatchWeaveWelcomeWhimperWhisperWieldWiggleWinkWinWonderedWonWounded
Some verbs beginning with J:jabjabberjackjailjamjanglejarjawjaywalkjeerjeopardizejerkjestjetjigglejiltjimmyjinglejitterjivejogjoinjokejoltjostlejotjoustjudgejugglejumpjunkjunkjustifyjutjuxtapose
Some verbs starting with the letter a:ableabandonabductaccountaccuseaceactaddaddressadmireadoreafflictageaggravateaimalertanimateapproachapprovearearriveaskassistassociateassortattachattendavengeavoidawakenax
Small Curious Sneaky
Some transitive verbs are:BringSendGiveMakeReadTake
They have the capability; and some of them are; but 99.9% of them have no bad intentions while being sneaky. They are refined; and have justice on their side. If they are being sneaky; it's most likely because they are trying to avoid the negativity of something.