素知らぬ振り
Expression- 1pretending not to know ; pretending not to recognize someone (recognise) ; feigning ignorance ; playing innocent Translated by Jiyomi
Other writings and readings
素知らぬふりそ知らぬふりそ知らぬ振りそしらぬ振り
expressions (phrases, clauses, etc.)
JMdict entry 2104080. Source and licence.