This was the word that first caught my eye as the obverse of onomatopoeia.
( This ( ( was ( ( the word ) ( that ( first ( ( caught ( my eye ) ) ( as ( ( the obverse ) ( of onomatopoeia ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBD was) (NP (NP (DT the) (NN word)) (SBAR (WHNP (WDT that)) (S (ADVP (RB first)) (VP (VBD caught) (NP (PRP$ my) (NN eye)) (PP (IN as) (NP (NP (DT the) (NN obverse)) (PP (IN of) (NP (NN onomatopoeia)))))))))) (. .)))
I didn't know the meaning of the word that caught my eye.
( I ( ( ( did n't ) ( know ( ( the meaning ) ( of ( ( the word ) ( that ( caught ( my eye ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD did) (RB n't) (VP (VB know) (NP (NP (DT the) (NN meaning)) (PP (IN of) (NP (NP (DT the) (NN word)) (SBAR (WHNP (WDT that)) (S (VP (VBD caught) (NP (PRP$ my) (NN eye)))))))))) (. .)))