Learn how to say Erectness correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word erect:
rigidly upright or straight:
she stood erect with her arms by her sides
(of the penis, clitoris, or nipples) enlarged and rigid, especially in sexual excitement.
put together and set upright (a building, wall, or other structure):
the guest house was erected in the eighteenth century
the police had erected roadblocks
create or establish (a theory or system):
the party that erected the welfare state
late Middle English: from Latin erect- ‘set up’, from the verb erigere, from e- (variant of ex-) ‘out’ + regere ‘to direct’