"crossest" in the adjective sense
1. cross, transverse, transversal, thwartwise
extending or lying across in a crosswise direction at right angles to the long axis
"cross members should be all steel"
"from the transverse hall the stairway ascends gracefully"
2. crabbed, crabby, cross, fussy, grouchy, grumpy, bad-tempered, ill-tempered
annoyed and irritable
Source: WordNet® (An amazing lexical database of English)
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