blankly
Word family
Synonym discussion
Sense: adverb/1
'Blankly' is the broadest of these four words for an empty reaction. It can describe a stare, a smile, or a face that seems not to understand or feel much. 'Vacantly' stays closest to the eyes and is especially natural with 'look' and 'stare'. 'Expressionlessly' focuses on the absence of visible feeling on the face, without suggesting confusion. 'Woodenly' adds stiffness, so it often suggests an unnatural or forced reaction as well as little emotion. A student who cannot follow a question may 'look blankly' at the teacher. Someone in shock may 'stare vacantly' at the wall. An actor might 'reply expressionlessly', while a nervous speaker may 'smile woodenly' at the audience.
Etymology
'Blankly' was formed by adding the adverb ending '-ly' to 'blank'. The base word came into English from Old French 'blanc', originally meaning 'white' or 'bright'. From the idea of a white, unmarked surface, English developed 'blank' for something empty or for a face without expression. The adverb later grew from that and now most often describes an empty look, though it can also intensify a complete refusal or denial in formal use.