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sneaking

sneaking /ˈsniːkɪŋ/ adjective
sneaking
/ˈsniːkɪŋ/
adjective
Britannica Dictionary definition of SNEAKING
always used before a noun
: behaving in a secret and dishonest manner
: not openly expressed usually + for
◊ If you have a sneaking feeling/suspicion, you think that something might be true or might happen even though you have no definite reason to think so.