Definition of know-not-what in English:

know-not-what

noun ˌnəʊnɒtˈwɒt

rare

An indescribable thing; a ‘whatchamacallit’. Also with the: that which is indescribable or unknown.

Mid 17th century; earliest use found in John Suckling (d.?1641), poet. From know + not + what adj.1 adverb.

nounˌnəʊnɒtˈwɒt

rare

An indescribable thing; a ‘whatchamacallit’. Also with the: that which is indescribable or unknown.

Mid 17th century; earliest use found in John Suckling (d. ?1641), poet. From know + not + what [adjective¹, adverb].

词汇	know-not-what
释义	Definition of know-not-what in English: know-not-what noun ˌnəʊnɒtˈwɒt rare An indescribable thing; a ‘whatchamacallit’. Also with the: that which is indescribable or unknown. Origin Mid 17th century; earliest use found in John Suckling (d.?1641), poet. From know + not + what adj.1 adverb. Definition of know-not-what in US English: know-not-what nounˌnəʊnɒtˈwɒt rare An indescribable thing; a ‘whatchamacallit’. Also with the: that which is indescribable or unknown. Origin Mid 17th century; earliest use found in John Suckling (d. ?1641), poet. From know + not + what [adjective¹, adverb].
随便看	bioacoustical bioacoustician bioacoustics bioactivation bioactive bioactivity bioactivity bioadhesive bioaerosol bioagent bioanalysis bioanalyst bioanalytic bioanalytical bioanthropological bioanthropology bioarchaeological bioarchaeological bioarchaeologist bioarchaeologist bioarchaeology bioarcheological bioarcheologist bioarcheology bioartificial