This is the 6866th most frequent German word.
fehlen
"Fehlen" means "to be missing" or "to lack" in English.
"Fehlen" is used to indicate the absence or insufficiency of something essential to express a sentiment (in this case, words).
Mir fehlen die Worte, um meine Gefühle auszudrücken.
I lack the words to express my feelings.
"Fehlen" denotes the absence of a specific item within a context (specifically, the omission of a name in a list).
Auf der Liste fehlt dein Name.
Your name is missing from the list.
"Fehlen" reflects the lack of a required or desired resource necessary to perform an activity (the energy needed for work).