etiolate

[French 'étioler', from Norman French 'étieuler', to grow into haulm, from 'éteule', stalk, from Old French 'esteule', from Latin 'stipula', stalk]

trans. v.
1. In botany, to cause a plant to develop without chlorophyl by preventing exposure to sunlight.
2. To cause to appear pale and sickly.
3. To make weak by stunting the growth or development of.