Index: graphspell-js/ibdawg.js
==================================================================
--- graphspell-js/ibdawg.js
+++ graphspell-js/ibdawg.js
@@ -174,10 +174,12 @@
                 throw ValueError("# Error: unknown code: " + this.nCompressionMethod);
         }
         //console.log(this.getInfo());
         this.bOptNumSigle = true;
         this.bOptNumAtLast = false;
+
+        this.aSuggState = new Set();
     }
 
     getInfo () {
         return  `  Language: ${this.sLangName}   Lang code: ${this.sLangCode}   Dictionary name: ${this.sDicName}\n` +
                 `  Compression method: ${this.nCompressionMethod}   Date: ${this.sDate}   Stemming: ${this.cStemming}FX\n` +
@@ -316,10 +318,11 @@
         }
         else if (sWord.gl_isLowerCase()) {
             this._suggest(oSuggResult, sWord.gl_toCapitalize(), nMaxSwitch, nMaxDel, nMaxHardRepl);
         }
         let aSugg = oSuggResult.getSuggestions(nSuggLimit);
+        this.aSuggState.clear();
         if (sSfx || sPfx) {
             // we add what we removed
             return aSugg.map( (sSugg) => { return sPfx + sSugg + sSfx } );
         }
         return aSugg;
@@ -335,10 +338,18 @@
             for (let sTail of this._getTails(iAddr)) {
                 oSuggResult.addSugg(sNewWord+sTail);
             }
             return;
         }
+        else if (sRemain.length < 4) {
+            let sState = sNewWord + ":" + sRemain;
+            if (this.aSuggState.has(sState)) {
+                return;
+            }
+            this.aSuggState.add(sState);
+        }
+
         let cCurrent = sRemain.slice(0, 1);
         for (let [cChar, jAddr] of this._getCharArcs(iAddr)) {
             if (char_player.d1to1.gl_get(cCurrent, cCurrent).indexOf(cChar) != -1) {
                 this._suggest(oSuggResult, sRemain.slice(1), nMaxSwitch, nMaxDel, nMaxHardRepl, nDeep+1, jAddr, sNewWord+cChar);
             }

Index: graphspell/ibdawg.py
==================================================================
--- graphspell/ibdawg.py
+++ graphspell/ibdawg.py
@@ -136,10 +136,12 @@
             raise ValueError("  # Error: unknown code: {}".format(self.nCompressionMethod))
 
         self.bOptNumSigle = False
         self.bOptNumAtLast = False
 
+        self.aSuggState = set()
+
     def _initBinary (self):
         "initialize with binary structure file"
         if self.by[0:17] != b"/grammalecte-fsa/":
             raise TypeError("# Error. Not a grammalecte-fsa binary dictionary. Header: {}".format(self.by[0:9]))
         if not(self.by[17:18] == b"1" or self.by[17:18] == b"2" or self.by[17:18] == b"3"):
@@ -291,10 +293,11 @@
         if sWord.istitle():
             self._suggest(oSuggResult, sWord.lower(), nMaxSwitch=nMaxSwitch, nMaxDel=nMaxDel, nMaxHardRepl=nMaxHardRepl)
         elif sWord.islower():
             self._suggest(oSuggResult, sWord.title(), nMaxSwitch=nMaxSwitch, nMaxDel=nMaxDel, nMaxHardRepl=nMaxHardRepl)
         aSugg = oSuggResult.getSuggestions(nSuggLimit)
+        self.aSuggState.clear()
         if sSfx or sPfx:
             # we add what we removed
             return list(map(lambda sSug: sPfx + sSug + sSfx, aSugg))
         return aSugg
 
@@ -305,10 +308,15 @@
             if int.from_bytes(self.byDic[iAddr:iAddr+self.nBytesArc], byteorder='big') & self._finalNodeMask:
                 oSuggResult.addSugg(sNewWord, nDeep)
             for sTail in self._getTails(iAddr):
                 oSuggResult.addSugg(sNewWord+sTail, nDeep)
             return
+        elif len(sRemain) < 4:
+            sState = sNewWord + ":" + sRemain
+            if sState in self.aSuggState:
+                return
+            self.aSuggState.add(sState)
         cCurrent = sRemain[0:1]
         for cChar, jAddr in self._getCharArcs(iAddr):
             if cChar in cp.d1to1.get(cCurrent, cCurrent):
                 self._suggest(oSuggResult, sRemain[1:], nMaxSwitch, nMaxDel, nMaxHardRepl, nDeep+1, jAddr, sNewWord+cChar)
             elif not bAvoidLoop and nMaxHardRepl: