strainfuladj.
/ˈstreɪnfʊl/ Causing or filled with strain; stressful.
ΘΚΠ
the mind > emotion > suffering > state of being harassed > [adjective] > stressful
stressful1886
strainful1935
1935 G. Frankau Three Englishmen lxix. 607 It came to Andrew—not for the first time in these strainful days—how great, whatever the outcome of this ordeal, would be the relief of its end.
1957 Psychol. Rev. 64 142/2 There is no built-in incentive for the foreigner to maintain a cognitively strainful regimen of attending further to speech sounds.
This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2018).
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adj.1935