How to Spell smile

Middle English smilen, going back to a Germanic verbal base *smil-, *smīl- (from earlier *smei̯l-) "smile," probably an extension with -l- of Indo-European *smei̯- "laugh, smile," whence Old Church Slavic smějǫ sę, smijati sę "to laugh," Latvian smeju, smiêt "to laugh, mock," Tocharian B smi- "smile," Sanskrit smáyate "(s/he) smiles," and with a -d- extension in Greek meidiáein "to smile," philomeidḗs "with a friendly smile," Latvian smaida "smile," smaidît "to smile, mock"