unblocked en · ADJ · etymology 1
Etymology
Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- English blocked English unblocked From un- + blocked.
Meanings
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(not-comparable) Not blocked (in various senses).
The difference between the two classifications has always been intended to cover unblocked and untrimmed hat bodies, such as panamas, bangkoks, and leghorns, and other hats which are woven by the natives in South American and oriental countries where they are produced.
1918, Schedules M and N, free list, customs administration and income tax; subject index, page 1515: