undergird

As a verb undergird

is to strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As a verb undergird

is to strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object.

As an acronym base is

b'''uilding'', '''''a'''ntenna-tower'', '''''s'''pan'', '''''e arth .

As a verb undergird

is to strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object.

As a noun foundation is

the act of founding, fixing, establishing, or beginning to erect.

As verbs the difference between underpin and undergird

is that underpin is to support from below with props or masonry while undergird is to strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object.

As verbs the difference between underwrite and undergird

is that underwrite is to write below or under; subscribe while undergird is to strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object.

As verbs the difference between bolster and undergird

is that bolster is to brace, reinforce, secure, or support while undergird is to strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object.

As a noun bolster

is a large cushion or pillow.

As verbs the difference between undergird and buttress

is that undergird is to strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object while buttress is to support something physically with, or as if with, a prop or buttress.

As a noun buttress is

(architecture) a brick or stone structure built against another structure to support it.

As a noun taxonomy

is the science or the technique used to make a classification.

As a verb undergird is

to strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object.

As verbs the difference between undergird and underbuild

is that undergird is to strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object while underbuild is to build beneath another structure; provide a foundation or support for; undergird.