The Concise Oxford Dictionary of World Religions (2014 page)

(i) 
s
s
, able to undertake a variety of functions;
(ii) 
bess
, able to focus on one particular function;
(iii) 
d
s
, possessing a function which is also held in general by other appearances;
(iv) 
is
, having a distinctive feature of its own;
(v) 
j
s
, having the power to form or construct in combination with other appearances;
(vi) 
es
, persistence through destruction.
Rokuso en’yu
is the ability of those trained in Kegon to see the six elements as being undifferentiated, whereas the untrained see these features as disparate.