Kou is composed, under its modern form, of 艸 ts'ao vegetation ("艹" in composition) as radical, and 句 chü crooked (line 110) as phonetic. It commonly means if, if only, etc. 

Pu is supposed to be a picture of a bird which is circling in the air and will not come down, the upper line representing the sky. 

Chiao is composed of 孝 hsiao filial piety (line 41) as phonetic and an obsolete radical meaning to tap (line 43). 

[Every translator so far has made the same serious error of rendering the 苟 kou in this line as though it were simply "if." It is elliptical however for 苟且 kou ch'ieh (line 274) wrongly, improperly etc., as carefully stated in Ho Hsing-ssü's commentary.] 

Hsing see line 2. 

Nai was originally a picture of vapour struggling forth. It is now a conjunctive and disjunctive particle, with other and more unusual values, demonstrative (line 95) and possessive. 

Ch'ien is composed of the walking radical (line 3) and a phonetic which means to ascend. The whole character originally meant to ascend, then to move from a given position, a departure from the norm, etc.