obliquus

I cannot find an etymology for this Latin word. There are no other
cognates in IE space for the word and everyone who tried to make an
etymology for this word could not connect it with anything.
The romanian word for "obliquus" is "aplecat".
Semantically and phonetically is a very good candidate but DEX give it
as being a derivative from " a apleca".
a apleca= to bend; to incline; to tilt ;vr to stoop; to bow; to lean; to
stoop; (în afara) to lean out; a i se apleca to feel sick
dex gives it as comming from Latin " applicare"=heranbringen, nähren,
anschliessen, landen lassen, anlegen, landen, zuwenden.

In both languages the words have a wide spectrum of senses but they do
not matches to each other.

I see the Rom. "a apleca" as a derivative of " a pleca"
a pleca=vt to bend; (capul) to bow; (ochii) to lower ;vi to leave, to go
away; to depart;vr to bend; to bow;
The verb " a pleca" is given by Dex as from Latin "plicare".
The Latin word as well as the Greek "pleko"=falten, zusammenrollen have
a different semantism as these of Rom.

Question: can we see "obliquus" as a cognate of "apleca"?