顧慮 == koryo == (noun that can act as a
verb using する) concern, solicitude, consideration
Right radical is 'head'.
Left radical is 'employ/quail' (雇), used phonetically for the meaning of
'turn around'. Thus, this character means, 'turn head around'. It is now used
in broader senses. Henshall suggests as a mnemonic:
'Employ head to look back.'
from Taka Kanji Database