in ‧ ex ‧ press ‧ ive /ˌɪnɪkˈspresɪv◂/ BrE AmE adjective
[ Word Family: adverb : ↑ expressively , ↑ expressionlessly , ↑ inexpressibly ; adjective : ↑ expressive ≠ ↑ inexpressive , ↑ expressionless , ↑ inexpressible ; noun : ↑ expression , ↑ expressiveness ; verb : ↑ express ]
a face that is inexpressive shows no emotion