隹

zhui

(short-tailed) bird

Signifies a small bird which looked at from its side. While “鸟[niǎo]” is used to and signify long-tailed and larger birds, this character is a general term to mean ‘short-tailed and smaller birds.’

集

ji

to gather, to collect

集市 market (where people gather); 诗集 shījí, "poetry collection"

Just as birds (隹) on a tree gather, humans assemble for trade or community

推

tui

to push

mother bird pushes her young with a wing to see if it is ready to leave the nest; or a hand pushes the birds

难

nan

difficult, hard

hand/again (you) + bird (zhui)

for a bird to use its wings as hands is very difficult and hard 

谁

shei

who, whom

你是谁 – Who are you?; 无论谁 "whoever"; 谁知道呢 "Who knows?"

a typical speech (讠) of a bird (隹) like an owl is who? who?

冫

bing

准

zhun

to allow, to permit

standard, norm;

accurate, precise

 基准 "benchmark"; 标准 An established measure; 准则 "norms"

a solidity of ice (冫) combined with preciseness (directional accuracy) of birds (隹) flight, gives us accurate and modern standards