- to submit or yield obsequiously or tamely (usually followed by to )
"give up or submit tamely," 1612, "sleep in a truckle bed" (see truckle (n.)). Meaning "give precedence, assume a submissive position" (1656, implied in truckling) is perhaps in allusion to that type of bed being used by servants and inferiors, or from it simply occupying the lower position. (http://dictionary.reference.com/browse/truckle)
"In the end neither Deloy nor Córdova nor Aguilar nor Palafox could entice Mendoza to break with the local movement he had soldiered for so long. If he would not truckle to Magaña, by now one of the clan, much less would he front for Peláez, a perfect outlander."
- John Womack, Zapata and the Mexican Revolution