舌下

sublingual / hypoglossal

used in 喇舌[la3 ji1] to transcribe the Taiwanese word for "tongue"

tongue

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

sublingual tablet (medicine)

sublingual gland / saliva gland under tongue

sublingual administration (medicine)