tiǎn
to lick
to lap
The tongue radical (舌) carries the full meaning here — it is the organ doing the licking. 忝 contributes the approximate sound tiǎn rather than any idea about tasting.
猫咪在舔自己的爪子。
māo mī zài tiǎn zì jǐ de zhuǎ zi。
The kitty is licking its own paws.
小狗跑过来舔了我的手。
xiǎo gǒu pǎo guò lái tiǎn le wǒ de shǒu。
The puppy ran over and licked my hand.
舔舐
tiǎn shì
to lick; to lap
舔吮
tiǎn shǔn
to lick and suck
舔屁股
tiǎn pì gu
to kiss sb's ass
舔狗
tiǎn gǒu
(neologism c. 2018) (slang) simp; person who resorts to cringeworthy fawning behavior in pursuing sb who does not requite their affections
舔肛
tiǎn gāng
anilingus
舔阴
tiǎn yīn
to perform cunnilingus