concertinaing
con-cer-ti-na-ing
verb
Folding or collapsing into many small, close pleats or sections.
"The metal barrier was concertinaing slowly."
Thesaurus
Synonyms: concertina
con-cer-ti-na-ing
Folding or collapsing into many small, close pleats or sections.
"The metal barrier was concertinaing slowly."
Synonyms: concertina