What's the root of the word "reckless"?

Search: reckless etymology

Why: I engaged in some reckless behavior today.

Answer: There is no root! That's just the word!

• O.E. receleas "careless, thoughtless, heedless,"
  
• earlier reccileas, from -leas "-less" + *rece, reccereccan "to care,"
• from W.Gmc. *rokijanan
• (cf. O.N. rækja "to care for," O.H.G. giruochan "to care for, have regard to," Ger. geruhen "to deign," which is infl. by ruhen "to rest"). No known cognates outside Gmc.
• The same affixed form is in Ger. ruchlos, Du. roekeloos "wicked."
  
• Root verb reck (O.E. reccan) is passing into obscurity. The -k- sound is probably a northern influence from O.N. cognate roekja.

Source: EtymOnline

The More You Know: What do those abbreviations mean!!!

• c.f. = L. confer "compare," i.e. "see this entry for more information"
• Du. = Dutch
  
• Ger. = German
  
• Gmc. = Germanic, a branch of Indo-European, ancestral language of English, German, Dutch, Frisian, Scandinavian tongues and several extinct languages such as Gothic and Frankish.
• O.E. = Old English
• O.H.G. = Old High German, the ancestor of the modern literary German language, spoken in the upland regions of Germany; German language as written and spoken from the earliest period to c.1100.
• O.N. = Old Norse
• W.Gmc. = West Germanic, the subgroup of Germanic comprising English, Dutch, German, Yiddish, Frisian, etc.; also the language spoken by the ancestral group during the presumed period of unity.